nih-gov/pubmed.ncbi.nlm.nih.gov/19819858/index.html

4422 lines
No EOL
153 KiB
HTML
Raw Permalink Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<!DOCTYPE html>
<html lang="en" >
<head itemscope itemtype="http://schema.org/WebPage" prefix="og: http://ogp.me/ns#" >
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<!-- Mobile properties -->
<meta name="HandheldFriendly" content="True">
<meta name="MobileOptimized" content="320">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="preconnect" href="https://cdn.ncbi.nlm.nih.gov">
<link rel="preconnect" href="https://www.ncbi.nlm.nih.gov">
<link rel="preconnect" href="https://www.google-analytics.com">
<link rel="stylesheet" href="https://cdn.ncbi.nlm.nih.gov/pubmed/277eb475-38df-4990-a0ee-0080b04e86fc/CACHE/css/output.ba8099dd2df4.css" type="text/css">
<link rel="stylesheet" href="https://cdn.ncbi.nlm.nih.gov/pubmed/277eb475-38df-4990-a0ee-0080b04e86fc/CACHE/css/output.452c70ce66f7.css" type="text/css">
<link rel="stylesheet" href="https://cdn.ncbi.nlm.nih.gov/pubmed/277eb475-38df-4990-a0ee-0080b04e86fc/CACHE/css/output.7bf600913d6e.css" type="text/css">
<link rel="stylesheet" href="https://cdn.ncbi.nlm.nih.gov/pubmed/277eb475-38df-4990-a0ee-0080b04e86fc/CACHE/css/output.0bfa59184c7a.css" type="text/css">
<link rel="stylesheet" href="https://cdn.ncbi.nlm.nih.gov/pubmed/277eb475-38df-4990-a0ee-0080b04e86fc/CACHE/css/output.b576742ffc3e.css" type="text/css">
<title>Search strings for the study of putative occupational determinants of disease - PubMed</title>
<link rel="preload" as="font" href="https://cdn.ncbi.nlm.nih.gov/pubmed/277eb475-38df-4990-a0ee-0080b04e86fc/uswds/dist/fonts/merriweather-bold-webfont.woff2" type="font/woff2" crossorigin />
<!-- Favicons -->
<link rel="shortcut icon" type="image/ico" href="https://cdn.ncbi.nlm.nih.gov/coreutils/nwds/img/favicons/favicon.ico" />
<link rel="icon" type="image/png" href="https://cdn.ncbi.nlm.nih.gov/coreutils/nwds/img/favicons/favicon.png" />
<!-- 192x192, as recommended for Android
http://updates.html5rocks.com/2014/11/Support-for-theme-color-in-Chrome-39-for-Android
-->
<link rel="icon" type="image/png" sizes="192x192" href="https://cdn.ncbi.nlm.nih.gov/coreutils/nwds/img/favicons/favicon-192.png" />
<!-- 57x57 (precomposed) for iPhone 3GS, pre-2011 iPod Touch and older Android devices -->
<link rel="apple-touch-icon-precomposed" href="https://cdn.ncbi.nlm.nih.gov/coreutils/nwds/img/favicons/favicon-57.png">
<!-- 72x72 (precomposed) for 1st generation iPad, iPad 2 and iPad mini -->
<link rel="apple-touch-icon-precomposed" sizes="72x72" href="https://cdn.ncbi.nlm.nih.gov/coreutils/nwds/img/favicons/favicon-72.png">
<!-- 114x114 (precomposed) for iPhone 4, 4S, 5 and post-2011 iPod Touch -->
<link rel="apple-touch-icon-precomposed" sizes="114x114" href="https://cdn.ncbi.nlm.nih.gov/coreutils/nwds/img/favicons/favicon-114.png">
<!-- 144x144 (precomposed) for iPad 3rd and 4th generation -->
<link rel="apple-touch-icon-precomposed" sizes="144x144" href="https://cdn.ncbi.nlm.nih.gov/coreutils/nwds/img/favicons/favicon-144.png">
<!-- For Pinger + Google Optimize integration (NS-820) -->
<meta name="ncbi_sg_optimize_id" content="">
<!-- Mobile browser address bar color -->
<meta name="theme-color" content="#20558a">
<!-- Preserve the Referrer when going from HTTPS to HTTP -->
<meta name="referrer" content="origin-when-cross-origin">
<meta name="ncbi_pinger_gtm_track" content="true"/>
<!-- Logging params: Pinger defaults -->
<meta name="ncbi_app" content="pubmed" />
<meta name="ncbi_db" content="pubmed" />
<meta name="ncbi_phid" content="BA3600017CB8DF0500002B889AB01D56.1.m_6" />
<meta name="ncbi_pinger_stat_url" content="https://www.ncbi.nlm.nih.gov/stat" />
<meta name="log_category" content="literature" />
<meta name="ncbi_cost_center" content="pubmed" />
<!-- Logging params: Pinger custom -->
<meta name="ncbi_pdid" content="abstract" />
<meta name="log_op" content="retrieve" />
<meta name="uid" content="19819858" />
<meta name="ncbi_uid" content="19819858" />
<meta name="log_displayeduids" content="19819858" />
<meta name="log_source_db" content="pubmed,pmc" />
<meta name="log_icons_present" content="true" />
<meta name="ncbi_search_id" content="baKULWJvIKEmjmzpBLKMtQ:647ff15141af266103a93759ef71cd80" />
<meta name="ncbi_adj_nav_search_id" content="O76G0u_mXSrhAito6o4KYg:647ff15141af266103a93759ef71cd80" />
<!-- Social meta tags for unfurling urls -->
<meta name="description" content="The proposed strings could help health care professionals explore putative occupational aetiology for diseases that are not generally thought to be work related."><meta name="keywords" content="pmid:19819858, PMC2989170, doi:10.1136/oem.2008.044727, Research Support, Non-U.S. Gov&#x27;t, Stefano Mattioli, Francesca Zanardi, Jos Verbeek, Humans, Information Storage and Retrieval / methods, Occupational Diseases / etiology*, Occupational Exposure*, PubMed*, PubMed Abstract, NIH, NLM, NCBI, National Institutes of Health, National Center for Biotechnology Information, National Library of Medicine, MEDLINE"><meta name="robots" content="index,nofollow,noarchive"><meta property="og:title" content="Search strings for the study of putative occupational determinants of disease - PubMed"><meta property="og:url" content="https://pubmed.ncbi.nlm.nih.gov/19819858/"><meta property="og:description" content="The proposed strings could help health care professionals explore putative occupational aetiology for diseases that are not generally thought to be work related."><meta property="og:image" content="https://cdn.ncbi.nlm.nih.gov/pubmed/persistent/pubmed-meta-image-v2.jpg"><meta property="og:image:secure_url" content="https://cdn.ncbi.nlm.nih.gov/pubmed/persistent/pubmed-meta-image-v2.jpg"><meta property="og:type" content="website"><meta property="og:site_name" content="PubMed"><meta name="twitter:domain" content="pubmed.ncbi.nlm.nih.gov"><meta name="twitter:card" content="summary_large_image"><meta name="twitter:title" content="Search strings for the study of putative occupational determinants of disease - PubMed"><meta name="twitter:url" content="https://pubmed.ncbi.nlm.nih.gov/19819858/"><meta name="twitter:description" content="The proposed strings could help health care professionals explore putative occupational aetiology for diseases that are not generally thought to be work related."><meta name="twitter:image" content="https://cdn.ncbi.nlm.nih.gov/pubmed/persistent/pubmed-meta-image-v2.jpg">
<!-- OpenSearch XML -->
<link rel="search" type="application/opensearchdescription+xml" href="https://cdn.ncbi.nlm.nih.gov/pubmed/persistent/opensearch.xml" title="PubMed search">
<!-- Disables severely broken elements when no JS -->
<noscript>
<link rel="stylesheet" type="text/css" href="https://cdn.ncbi.nlm.nih.gov/pubmed/277eb475-38df-4990-a0ee-0080b04e86fc/core/no-script.css">
</noscript>
<meta name="citation_title" content="Search strings for the study of putative occupational determinants of disease">
<meta name="citation_authors" content="Mattioli S;Zanardi F;Baldasseroni A;Schaafsma F;Cooke RM;Mancini G;Fierro M;Santangelo C;Farioli A;Fucksia S;Curti S;Violante FS;Verbeek J;">
<meta name="citation_date" content="2010 Jul">
<meta name="citation_publisher" content="Occup Environ Med">
<meta name="citation_journal_title" content="Occupational and environmental medicine">
<meta name="citation_pmid" content="19819858">
<meta name="citation_abstract_html_url" content="https://pubmed.ncbi.nlm.nih.gov/19819858/">
<meta name="citation_volume" content="67">
<meta name="citation_issue" content="7">
<meta name="citation_doi" content="10.1136/oem.2008.044727">
<meta name="citation_issn" content="1470-7926">
<link rel="canonical" href="https://pubmed.ncbi.nlm.nih.gov/19819858/" />
</head>
<body >
<noscript>
<div class="no-script-banner" id="no-script-banner">
<div class="warning-message">
<div class="warning-message-text">
This site needs JavaScript to work properly. Please enable it to take advantage of the complete set of features!
</div>
</div>
</div>
</noscript>
<div class="no-session-banner" id="no-session-banner" hidden>
<div class="warning-message">
<div class="warning-message-text">
Clipboard, Search History, and several other advanced features are temporarily unavailable.
</div>
<button class="close-banner-button"
title="Close Clipboard and Search History not available warning banner"
ref="linksrc=close_no_session_banner"
aria-controls="no-session-banner"
aria-label="Close Clipboard and Search History not available warning banner"
aria-expanded="true">
</button>
</div>
</div>
<a class="usa-skipnav" href="#article-details">
Skip to main page content
</a>
<!-- ========== BEGIN HEADER ========== -->
<section class="usa-banner">
<div class="usa-accordion">
<header class="usa-banner-header">
<div class="usa-grid usa-banner-inner">
<img src="https://www.ncbi.nlm.nih.gov/coreutils/uswds/img/favicons/favicon-57.png" alt="U.S. flag" />
<p>An official website of the United States government</p>
<button
class="usa-accordion-button usa-banner-button"
aria-expanded="false"
aria-controls="gov-banner-top"
>
<span class="usa-banner-button-text">Here's how you know</span>
</button>
</div>
</header>
<div
class="usa-banner-content usa-grid usa-accordion-content"
id="gov-banner-top"
>
<div class="usa-banner-guidance-gov usa-width-one-half">
<img
class="usa-banner-icon usa-media_block-img"
src="https://www.ncbi.nlm.nih.gov/coreutils/uswds/img/icon-dot-gov.svg"
alt="Dot gov"
/>
<div class="usa-media_block-body">
<p>
<strong>The .gov means its official.</strong>
<br />
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure youre on a federal
government site.
</p>
</div>
</div>
<div class="usa-banner-guidance-ssl usa-width-one-half">
<img
class="usa-banner-icon usa-media_block-img"
src="https://www.ncbi.nlm.nih.gov/coreutils/uswds/img/icon-https.svg"
alt="Https"
/>
<div class="usa-media_block-body">
<p>
<strong>The site is secure.</strong>
<br />
The <strong>https://</strong> ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
</p>
</div>
</div>
</div>
</div>
</section>
<div class="usa-overlay"></div>
<header class="ncbi-header" role="banner" data-section="Header">
<div class="usa-grid">
<div class="usa-width-one-whole">
<div class="ncbi-header__logo">
<a href="https://www.ncbi.nlm.nih.gov/" class="logo" aria-label="NCBI Logo" data-ga-action="click_image" data-ga-label="NIH NLM Logo">
<img src="https://www.ncbi.nlm.nih.gov/coreutils/nwds/img/logos/AgencyLogo.svg" alt="NIH NLM Logo" />
</a>
</div>
<div class="ncbi-header__account">
<a id="account_login" href="https://account.ncbi.nlm.nih.gov" class="usa-button header-button" style="display:none" data-ga-action="open_menu" data-ga-label="account_menu">Log in</a>
<button id="account_info" class="header-button" style="display:none"
aria-controls="account_popup">
<span class="fa fa-user" aria-hidden="true"></span>
<span class="username desktop-only" aria-hidden="true" id="uname_short"></span>
<span class="sr-only">Show account info</span>
</button>
</div>
<div class="ncbi-popup-anchor">
<div class="ncbi-popup account-popup" id="account_popup" aria-hidden="true">
<div class="ncbi-popup-head">
<button class="ncbi-close-button" data-ga-action="close_menu" data-ga-label="account_menu"><span class="fa fa-times"></span><span class="usa-sr-only">Close</span></button>
<h4>Account</h4>
</div>
<div class="account-user-info">
Logged in as:<br/>
<b><span class="username" id="uname_long">username</span></b>
</div>
<div class="account-links">
<ul class="usa-unstyled-list">
<li><a id="account_myncbi" href="/myncbi/" class="set-base-url" data-ga-action="click_menu_item" data-ga-label="account_myncbi">Dashboard</a></li>
<li><a id="account_pubs" href="/myncbi/collections/bibliography/" class="set-base-url" data-ga-action="click_menu_item" data-ga-label="account_pubs">Publications</a></li>
<li><a id="account_settings" href="/account/settings/" class="set-base-url" data-ga-action="click_menu_item" data-ga-label="account_settings">Account settings</a></li>
<li><a id="account_logout" href="/account/signout/" class="set-base-url" data-ga-action="click_menu_item" data-ga-label="account_logout">Log out</a></li>
</ul>
</div>
</div>
</div>
</div>
</div>
</header>
<div role="navigation" aria-label="access keys">
<a id="nws_header_accesskey_0" href="https://www.ncbi.nlm.nih.gov/guide/browsers/#ncbi_accesskeys" class="usa-sr-only" accesskey="0" tabindex="-1">Access keys</a>
<a id="nws_header_accesskey_1" href="https://www.ncbi.nlm.nih.gov" class="usa-sr-only" accesskey="1" tabindex="-1">NCBI Homepage</a>
<a id="nws_header_accesskey_2" href="/myncbi/" class="set-base-url usa-sr-only" accesskey="2" tabindex="-1">MyNCBI Homepage</a>
<a id="nws_header_accesskey_3" href="#maincontent" class="usa-sr-only" accesskey="3" tabindex="-1">Main Content</a>
<a id="nws_header_accesskey_4" href="#" class="usa-sr-only" accesskey="4" tabindex="-1">Main Navigation</a>
</div>
<section data-section="Alerts">
<div class="ncbi-alerts-placeholder"></div>
</section>
<!-- ========== END HEADER ========== -->
<a id="maincontent" aria-label="Main page content below" role="navigation"></a>
<input type="hidden" name="csrfmiddlewaretoken" value="Nl98KuHr7NOvDrCaNAucnKDp1vuqMgNT48TdnkaNHoBZxSI0qT7eRS93zzcCFRld">
<form action="/" method="get" autocomplete="off" class="usa-search usa-search-big search-form content-page-layout" id="search-form" role="search">
<div class="inner-wrap">
<a class="pubmed-logo"
aria-label="Pubmed Logo"
href="/"
data-ga-category="featured_link"
data-ga-action="pubmed_logo">
<img src="https://cdn.ncbi.nlm.nih.gov/pubmed/277eb475-38df-4990-a0ee-0080b04e86fc/core/images/pubmed-logo-blue.svg" alt="pubmed logo" />
</a>
<a href="#" class="search-input-trigger" data-alt-title="Hide search bar" title="Show search bar" aria-label="Show search bar">
</a>
<div role="search" class="search-input">
<div class="form-field ">
<label class="usa-sr-only" for="id_term">
Search:
</label>
<input
type="search"
name="term"
data-skip-ie-scroll-to-top=""
data-replace-term-with-exact=""
data-exact-query=""
placeholder=""
class="term-input"
required="required"
id="id_term"/><a href="#" class="clear-btn" aria-label="Clear search input" title="Clear search input" role="button" data-pinger-ignore></a><button type="submit" class="search-btn" aria-label="Search" disabled data-pinger-ignore><span class="usa-search-submit-text">Search</span></button>
</div>
</div>
<!-- Create alert and Create RSS are buttons that look like links -->
<!-- Better for them to look like buttons but no space -->
<div class="search-links-wrapper content-page-layout">
<div class="search-links">
<a href="/advanced/"
class="search-input-link adv-search-link"
data-ga-category="featured_link"
data-ga-action="adv_search">Advanced</a>
<a href="/clipboard/"
class="search-input-link clipboard-link hidden"
data-ga-category="featured_link"
data-ga-action="clipboard">
Clipboard <span class="amount-in-clipboard"></span>
</a>
</div>
<span class="search-input-link user-guide-link" role="navigation" aria-label="User guide">
<a href="/help/"
data-ga-category="featured_link"
data-ga-action="user_guide">
User Guide
</a>
</span>
</div>
</div>
</form>
<div id="article-page-header">
<div id="article-top-actions-bar" class="article-top-actions-bar">
<div class="inner-wrap">
<div class="actions-container">
<div class="return-to-search">
</div>
<div class="multiple-results-actions " role="region" aria-label="save, email, send to">
<button id="save-results-panel-trigger"
type="button"
class="save-results save-results-panel-trigger"
aria-expanded="false"
aria-controls="save-action-panel"
data-ga-category="save_share"
data-ga-action="save"
data-ga-label="open">
Save
</button><button id="email-results-panel-trigger"
type="button"
class="email-results email-results-panel-trigger"
aria-expanded="false"
aria-controls="email-action-panel"
data-ga-category="save_share"
data-ga-action="email"
data-ga-label="open">
Email
</button><div class="more-actions dropdown-block"><button id="more-actions-trigger"
type="button"
class="trigger more-actions-trigger"
ref="linksrc=show_moreactions_btn"
aria-label="Send to"
aria-controls="more-actions-dropdown">Send to</button><div id="more-actions-dropdown" class="dropdown dropdown-container" hidden><div class="content"><ul class="more-actions-links"><li><a class="clipboard-panel-trigger dropdown-block-link "
href="#"
role="button"
data-ga-category="save_share"
data-ga-action="clipboard"
data-ga-label="send">
Clipboard
</a></li><li><a role="button" class="dropdown-block-link bibliography-trigger-target" href="https://account.ncbi.nlm.nih.gov/?back_url=https%3A%2F%2Fpubmed.ncbi.nlm.nih.gov%2F19819858%2F%23open-bibliography-panel">My Bibliography</a></li><li><a role="button" class="dropdown-block-link collections-trigger-target" href="https://account.ncbi.nlm.nih.gov/?back_url=https%3A%2F%2Fpubmed.ncbi.nlm.nih.gov%2F19819858%2F%23open-collections-panel">Collections</a></li><li><a role="button" class="citation-manager-panel-trigger dropdown-block-link citation-manager-trigger-target" href="#">Citation manager</a></li></ul></div></div></div>
</div>
<div class="display-options" data-format-key="format"
data-default-format-value="abstract"
data-current-format-value="abstract" role="region">
<button
class="trigger usa-button"
title="Change format"
data-ga-category="display_options"
data-ga-action="display_options_dialog">
<span class="button-label">Display options</span>
</button>
<div class="dropdown" hidden>
<div class="title">
Display options
</div>
<div class="content">
<div class="format-container">
<span class="option-label">
Format
</span>
<select name="format" data-initial-value="abstract" aria-label="Display format" id="article-display-format">
<option value="abstract">Abstract</option>
<option value="pubmed">PubMed</option>
<option value="pmid">PMID</option>
</select>
</div>
</div>
</div>
</div>
<input type="hidden" name="csrfmiddlewaretoken" value="Nl98KuHr7NOvDrCaNAucnKDp1vuqMgNT48TdnkaNHoBZxSI0qT7eRS93zzcCFRld">
</div>
</div>
</div>
<div id="article-panels-container" class="article-panels-container">
<div id="save-action-panel" class="save-action-panel action-panel" aria-hidden="true">
<div class="inner-wrap">
<h2 class="action-panel-heading">
Save citation to file
</h2>
<form id="save-action-panel-form"
class="action-panel-content action-form"
action="/results-export-ids/"
data-by-search-action="/results-export-search-data/"
data-by-ids-action="/results-export-ids/"
method="post"
data-by-search-method="post"
data-by-ids-method="post">
<input type="hidden" name="csrfmiddlewaretoken" value="Nl98KuHr7NOvDrCaNAucnKDp1vuqMgNT48TdnkaNHoBZxSI0qT7eRS93zzcCFRld">
<div class="action-panel-control-wrap">
<label for="save-action-format" class="action-panel-label">
Format:
</label>
<select id="save-action-format" name="results-format" class="action-panel-selector">
<option value="summary-text">Summary (text)</option>
<option value="pubmed-text">PubMed</option>
<option value="pmid">PMID</option>
<option value="abstract">Abstract (text)</option>
<option value="csv">CSV</option>
</select>
</div>
<div class="action-panel-actions">
<button class="action-panel-submit"
type="submit"
data-loading-label="Saving..."
data-ga-category="save_share"
data-ga-action="save"
data-ga-label="save">
Create file
</button>
<button class="action-panel-cancel"
aria-label="Close 'Save citations to file' panel"
ref="linksrc=close_save_panel"
aria-controls="save-action-panel"
aria-expanded="false"
data-ga-category="save_share"
data-ga-action="save"
data-ga-label="cancel">
Cancel
</button>
</div>
</form>
</div>
</div>
<div id="email-action-panel"
class="email-action-panel action-panel"
aria-hidden="true"
data-recaptcha-script-url="https://www.recaptcha.net/recaptcha/enterprise.js?render=explicit&onload=onloadCaptchaCallback"
data-recaptcha-enabled="true">
<div class="inner-wrap">
<h2 class="action-panel-heading">
Email citation
</h2>
<form id="email-action-panel-form"
class="action-panel-content action-form"
action="/send-email/"
data-by-search-action="/results-export-email-by-search-data/"
data-by-ids-action="/send-email/"
data-by-search-method="post"
data-by-ids-method="post"
method="post"
>
<input type="hidden" name="csrfmiddlewaretoken" value="Nl98KuHr7NOvDrCaNAucnKDp1vuqMgNT48TdnkaNHoBZxSI0qT7eRS93zzcCFRld">
<div class="action-panel-control-wrap">
<span class="action-panel-label">
Subject:
</span>
<span class="email-subject" id="email-subject" aria-label="Email subject">1 selected item: 19819858 - PubMed</span>
<input type="hidden" name="email-subject" value="1 selected item: 19819858"/>
<input type="hidden" name="email-subject-hash" value="28f7e246e4a25bc92f62990fd14eb322835002ca3dac9235ac43e95dd8c3826f"/>
</div>
<div class="action-panel-control-wrap">
<label for="email-to" class="action-panel-label required-field-asterisk">
To:
</label>
<input type="email" aria-label="Recipient Email Address" placeholder="email@example.com" id="email-to" class="email-to" pattern="^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$" maxlength="100" required>
</div>
<div class="action-panel-control-wrap">
<label for="email-from" class="action-panel-label">
From:
</label>
<input type="email" aria-label="Sender Email Address" placeholder="email@example.com" id="email-from" class="email-from" pattern="^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$" maxlength="256">
</div>
<div class="action-panel-control-wrap">
<label for="email-citation-format" class="action-panel-label">
Format:
</label>
<select id="email-citation-format" name="citation-format" class="action-panel-selector email-citation-format">
<option selected="selected" value="summary">Summary</option>
<option value="summary-text">Summary (text)</option>
<option value="abstract">Abstract</option>
<option value="abstract-text">Abstract (text)</option>
</select>
</div>
<div class="include-supplemental-container">
<input type="checkbox" aria-label="Include MeSH and other data" name="include-supplemental" id="email-include-supplemental" class="email-include-supplemental">
<label for="email-include-supplemental" class="email-include-supplemental-label">MeSH and other data</label>
</div>
<div class="form-field recaptcha ">
<div class="g-recaptcha" id="id-recaptcha" data-sitekey="6LfsWHMdAAAAAClKbtOpjQ2pMjgsGxvv7NdZW9uI"></div>
</div>
<div id="captcha-error-message" class="usa-input-error-message captcha-validation-message" role="alert"></div>
<div class="action-panel-actions">
<button class="action-panel-submit"
type="submit"
data-loading-label="Sending..."
data-ga-category="save_share"
data-ga-action="email"
data-ga-label="send">
Send email
</button>
<button class="action-panel-cancel"
aria-label="Close 'Email citations' panel"
ref="linksrc=close_email_panel"
aria-controls="email-action-panel"
aria-expanded="false"
data-ga-category="save_share"
data-ga-action="email"
data-ga-label="cancel">
Cancel
</button>
</div>
<input type="hidden" name="email-search-details" value="" />
<input type="hidden" name="email-search-details-hash" value="0e42663a6c3bd85498fcb88798998fed7bfdc45d457db35281e41afe13cc0524" />
</form>
</div>
</div>
<div id="collections-action-panel"
class="collections-action-panel action-panel in-progress-dots-panel"
aria-hidden="true"
data-collections-open-panel-enabled="false"
data-collections-open-panel-url-hash="#open-collections-panel">
<div class="inner-wrap">
<h3 class="action-panel-heading">
Add to Collections
</h3>
<form id="collections-action-panel-form"
class="collections-action-panel-form action-panel-content action-form action-panel-smaller-selectors"
data-existing-collections-url="/list-existing-collections/"
data-add-to-existing-collection-url="/add-to-existing-collection/"
data-create-and-add-to-new-collection-url="/create-and-add-to-new-collection/"
data-get-article-ids-by-search-url="/get-article-ids-by-search/"
data-myncbi-max-collection-name-length="100"
data-add-to-collection-max-amount="1000"
data-collections-root-url="https://www.ncbi.nlm.nih.gov/myncbi/collections/">
<input type="hidden" name="csrfmiddlewaretoken" value="Nl98KuHr7NOvDrCaNAucnKDp1vuqMgNT48TdnkaNHoBZxSI0qT7eRS93zzcCFRld">
<div class="choice-group" role="radiogroup">
<ul class="radio-group-items">
<li>
<input type="radio"
id="collections-action-panel-new"
class="collections-new"
name="collections"
value="new"
data-ga-category="save_share"
data-ga-action="collections"
data-ga-label="collections_radio_new">
<label for="collections-action-panel-new">Create a new collection</label>
</li>
<li>
<input type="radio"
id="collections-action-panel-existing"
class="collections-existing"
name="collections"
value="existing"
checked="true"
data-ga-category="save_share"
data-ga-action="collections"
data-ga-label="collections_radio_existing">
<label for="collections-action-panel-existing">Add to an existing collection</label>
</li>
</ul>
</div>
<div class="controls-wrapper">
<div class="action-panel-control-wrap new-collections-controls">
<label for="collections-action-panel-add-to-new" class="action-panel-label required-field-asterisk">
Name your collection:
</label>
<input
type="text"
name="add-to-new-collection"
id="collections-action-panel-add-to-new"
class="collections-action-add-to-new"
pattern="[^&quot;&amp;=&lt;&gt;\/]*" title="The following characters are not allowed in the Name field: &quot;&amp;=&lt;&gt;/"
maxlength="100"
data-ga-category="save_share"
data-ga-action="create_collection"
data-ga-label="non_favorties_collection">
<div class="collections-new-name-too-long usa-input-error-message selection-validation-message">
Name must be less than 100 characters
</div>
</div>
<div class="action-panel-control-wrap existing-collections-controls">
<label for="collections-action-panel-add-to-existing" class="action-panel-label">
Choose a collection:
</label>
<select id="collections-action-panel-add-to-existing"
class="action-panel-selector collections-action-add-to-existing"
data-ga-category="save_share"
data-ga-action="select_collection"
data-ga-label="($('#collections-action-add-to-existing').val() === 'Favorites') ? 'Favorites' : 'non_favorites_collection'">
</select>
<div class="collections-retry-load-on-error usa-input-error-message selection-validation-message">
Unable to load your collection due to an error<br>
<a href="#">Please try again</a>
</div>
</div>
</div>
<div class="action-panel-actions">
<button class="action-panel-submit"
type="submit"
data-loading-label="Adding..."
data-pinger-ignore
data-ga-category="save_share"
data-ga-action="collections"
data-ga-label="add">
Add
</button>
<button class="action-panel-cancel"
aria-label="Close 'Add to Collections' panel"
ref="linksrc=close_collections_panel"
aria-controls="collections-action-panel"
aria-expanded="false"
data-ga-category="save_share"
data-ga-action="collections"
data-ga-label="cancel">
Cancel
</button>
</div>
</form>
</div>
</div>
<div id="bibliography-action-panel"
class="bibliography-action-panel action-panel in-progress-dots-panel"
aria-hidden="true"
data-bibliography-open-panel-enabled="false"
data-bibliography-open-panel-url-hash="#open-bibliography-panel">
<div class="inner-wrap">
<h3 class="action-panel-heading">
Add to My Bibliography
</h3>
<form id="bibliography-action-panel-form"
class="bibliography-action-panel-form action-panel-content action-form action-panel-smaller-selectors"
data-add-to-bibliography-max-amount="100"
data-add-to-bibliography-batch-size="10"
data-bibliography-delegates-url="/list-bibliography-delegates/"
data-add-to-bibliography-url="/add-to-bibliography/"
data-get-article-ids-by-search-url="/get-article-ids-by-search/"
data-mybib-root-url="https://www.ncbi.nlm.nih.gov/myncbi/collections/mybibliography/">
<input type="hidden" name="csrfmiddlewaretoken" value="Nl98KuHr7NOvDrCaNAucnKDp1vuqMgNT48TdnkaNHoBZxSI0qT7eRS93zzcCFRld">
<div class="action-panel-control-wrap bibliographies-controls">
<div class="choice-group">
<ul class="bibliographies-action-add radio-group-items">
<li>
<input name="bibliography" id="my-bibliography" class="my-bibliography" type="radio" checked/>
<label for="my-bibliography">My Bibliography</label>
</li>
</ul>
</div>
</div>
<div class="bibliographies-retry-load-on-error usa-input-error-message selection-validation-message">
Unable to load your delegates due to an error<br>
<a href="#">Please try again</a>
</div>
<div class="action-panel-actions">
<button class="action-panel-submit"
type="submit"
data-loading-label="Adding..."
data-pinger-ignore>
Add
</button>
<button class="action-panel-cancel"
aria-label="Close 'Add to bibliography' panel"
ref="linksrc=close_bibliography_panel"
aria-controls="bibliography-action-panel"
aria-expanded="false"
data-ga-category="save_share"
data-ga-action="mybib"
data-ga-label="cancel">
Cancel
</button>
</div>
</form>
</div>
</div>
<div id="saved-search-action-panel" class="saved-search-action-panel action-panel " aria-hidden="true"
data-saved-search-open-panel-enabled="false"
data-saved-search-open-panel-url-hash="#open-saved-search-panel">
<div class="inner-wrap">
<h2 class="action-panel-heading">
Your saved search
</h2>
<form id="saved-search-action-panel-form"
class="saved-search-action-panel-form action-panel-content action-form"
data-create-saved-search-url="/create-saved-search/"
data-try-search-terms-url="/try-search-term/"
data-saved-search-root-url="https://www.ncbi.nlm.nih.gov/myncbi/searches/">
<input type="hidden" name="csrfmiddlewaretoken" value="Nl98KuHr7NOvDrCaNAucnKDp1vuqMgNT48TdnkaNHoBZxSI0qT7eRS93zzcCFRld">
<div class="action-panel-control-wrap">
<label for="saved-search-name" class="action-panel-label saved-search-name-label required-field-asterisk">
Name of saved search:
</label>
<input maxlength="200"
type="text"
name="saved-search-name"
id="saved-search-name"
class="saved-search-name"
value=""
required
pattern="[^&quot;&amp;=&lt;&gt;\/]*" title="The following characters are not allowed in the Name field: &quot;&amp;=&lt;&gt;/">
</div>
<div class="action-panel-control-wrap">
<label for="saved-search-term" class="action-panel-label required-field-asterisk">
Search terms:
</label>
<textarea name="saved-search-term" id="saved-search-term" class="saved-search-term" required></textarea>
</div>
<div class="test-search-term-wrap">
<a href="#" class="try-search-term">Test search terms</a>
</div>
<div class="choice-group action-panel-extra-margin-top">
<span class="action-panel-label" id="fieldset-label">
Would you like email updates of new search results?
</span>
<fieldset id="saved-search-alert" aria-describedby="fieldset-label">
<legend class="usa-sr-only">Saved Search Alert Radio Buttons</legend>
<ul class="radio-group-items">
<li>
<input type="radio" id="saved-search-alert-yes" class="saved-search-alert-yes" name="saved-search-alert" value="yes" checked>
<label for="saved-search-alert-yes" class="action-panel-label">Yes</label>
</li>
<li>
<input aria-label="No radio input" type="radio" id="saved-search-alert-no" class="saved-search-alert-no" name="saved-search-alert" value="no">
<label for="saved-search-alert-no" class="action-panel-label">No</label>
</li>
</ul>
</fieldset>
</div>
<div class="alert-schedule-wrap">
<div class="action-panel-control-wrap">
<label class="action-panel-label">
Email:
</label>
<span aria-label="Email address" id="saved-search-email" class="action-panel-label"><span class="action-panel-label-bold"></span> (<a class="myncbi-account-settings" href="https://www.ncbi.nlm.nih.gov/account/settings/">change</a>)</span>
</div>
<div class="action-panel-control-wrap action-panel-extra-margin-top">
<label for="saved-search-frequency" class="action-panel-label">
Frequency:
</label>
<select id="saved-search-frequency" class="no-border-panel-selector saved-search-frequency">
<option value="monthly">Monthly</option>
<option value="weekly">Weekly</option>
<option value="daily">Daily</option>
</select>
</div>
<div class="action-panel-control-wrap saved-search-monthly-additional">
<label for="saved-search-monthly-on-day" class="action-panel-label">
Which day?
</label>
<select id="saved-search-monthly-on-day" class="no-border-panel-selector">
<option value="Sunday">The first Sunday</option>
<option value="Monday">The first Monday</option>
<option value="Tuesday">The first Tuesday</option>
<option value="Wednesday">The first Wednesday</option>
<option value="Thursday">The first Thursday</option>
<option value="Friday">The first Friday</option>
<option value="Saturday">The first Saturday</option>
<option value="day">The first day</option>
<option value="weekday">The first weekday</option>
</select>
</div>
<div class="action-panel-control-wrap saved-search-weekly-additional">
<label for="saved-search-weekly-on-day" class="action-panel-label">
Which day?
</label>
<select id="saved-search-weekly-on-day" class="no-border-panel-selector saved-search-weekly-on-day">
<option value="Sunday">Sunday</option>
<option value="Monday">Monday</option>
<option value="Tuesday">Tuesday</option>
<option value="Wednesday">Wednesday</option>
<option value="Thursday">Thursday</option>
<option value="Friday">Friday</option>
<option value="Saturday">Saturday</option>
</select>
</div>
<div class="action-panel-control-wrap">
<label for="saved-search-report" class="action-panel-label">
Report format:
</label>
<select id="saved-search-report" class="no-border-panel-selector saved-search-report">
<option value="DocSum">Summary</option>
<option value="DocSumText">Summary (text)</option>
<option value="Abstract">Abstract</option>
<option value="AbstractText">Abstract (text)</option>
<option value="MEDLINE">PubMed</option>
</select>
</div>
<div class="action-panel-control-wrap">
<label for="saved-search-amount" class="action-panel-label">
Send at most:
</label>
<select id="saved-search-amount" class="no-border-panel-selector saved-search-amount">
<option value="1">1 item</option>
<option value="5" selected>5 items</option>
<option value="10">10 items</option>
<option value="20">20 items</option>
<option value="50">50 items</option>
<option value="100">100 items</option>
<option value="200">200 items</option>
</select>
</div>
<div>
<input type="checkbox" id="saved-search-send-if-no-result" class="saved-search-send-if-no-result" name="saved-search-send-if-no-result">
<label for="saved-search-send-if-no-result" class="action-panel-label smaller-checkbox">
Send even when there aren't any new results
</label>
</div>
<div class="action-panel-control-wrap option-text-in-email-wrap">
<label for="saved-search-email-text" class="action-panel-label">
Optional text in email:
</label>
<textarea name="saved-search-email-text"
id="saved-search-email-text"
class="saved-search-email-text"></textarea>
</div>
</div>
<div class="action-panel-actions">
<button class="action-panel-submit"
type="submit"
data-loading-label="Saving..."
data-ga-category="save_share"
data-ga-action="alert"
data-ga-label="save">
Save
</button>
<button class="action-panel-cancel"
aria-label="Close 'Your saved search' panel"
ref="linksrc=close_saved_search_panel"
aria-controls="saved-search-action-panel"
aria-expanded="false"
data-ga-category="save_share"
data-ga-action="alert"
data-ga-label="cancel">
Cancel
</button>
</div>
</form>
</div>
</div>
<div id="citation-manager-action-panel" class="citation-manager-action-panel action-panel" aria-hidden="true">
<div class="inner-wrap">
<h2 class="action-panel-heading">
Create a file for external citation management software
</h2>
<form id="citation-manager-action-panel-form"
class="action-panel-content action-form"
action="/results-export-ids/"
data-by-search-action="/results-export-search-data/"
data-by-ids-action="/results-export-ids/"
method="post"
data-by-search-method="post"
data-by-ids-method="post">
<input type="hidden" name="csrfmiddlewaretoken" value="Nl98KuHr7NOvDrCaNAucnKDp1vuqMgNT48TdnkaNHoBZxSI0qT7eRS93zzcCFRld">
<input name="results-format" type="hidden" value="pubmed"/>
<div class="action-panel-actions">
<button class="action-panel-submit"
type="submit"
data-loading-label="Sending..."
data-ga-category="save_share"
data-ga-action="citation_manager"
data-ga-label="save">
Create file
</button>
<button class="action-panel-cancel"
aria-label="Close 'Send citations to citation manager' panel"
ref="linksrc=close_citation_manager_panel"
aria-controls="citation-manager-action-panel"
aria-expanded="false"
data-ga-category="save_share"
data-ga-action="citation_manager"
data-ga-label="cancel">
Cancel
</button>
</div>
</form>
</div>
</div>
<div id="rss-action-panel" class="rss-action-panel action-panel " aria-hidden="true">
<div class="inner-wrap">
<h2 class="action-panel-heading">
Your RSS Feed
</h2>
<form id="rss-action-panel-form"
class="rss-action-panel-form action-panel-content action-form"
data-create-rss-feed-url="/create-rss-feed-url/"
data-search-form-term-value="">
<input type="hidden" name="csrfmiddlewaretoken" value="Nl98KuHr7NOvDrCaNAucnKDp1vuqMgNT48TdnkaNHoBZxSI0qT7eRS93zzcCFRld">
<div class="action-panel-control-wrap">
<label for="rss-name" class="action-panel-label required-field-asterisk">
Name of RSS Feed:
</label>
<input maxlength="200"
placeholder="Name"
type="text"
name="rss-name"
id="rss-name"
class="rss-name"
value=''
required
pattern="[^&quot;&amp;=&lt;&gt;\/]*" title="The following characters are not allowed in the Name field: &quot;&amp;=&lt;&gt;/">
</div>
<div class="rss-limit-wrap">
<div class="action-panel-control-wrap action-panel-extra-margin-top">
<label for="rss-limit" class="action-panel-label">
Number of items displayed:
</label>
<select id="rss-limit" class="no-border-panel-selector rss-limit">
<option value="5">5</option>
<option value="10">10</option>
<option value="15" selected="selected">15</option>
<option value="20">20</option>
<option value="50">50</option>
<option value="100">100</option>
</select>
</div>
</div>
<div class="action-panel-actions">
<button class="action-panel-submit"
type="submit"
data-loading-label="Creating..."
data-ga-category="save_share"
data-ga-action="alert"
data-ga-label="save">
Create RSS
</button>
<button class="action-panel-cancel"
aria-label="Close 'Your RSS' panel"
ref="linksrc=close_rss_panel"
aria-controls="rss-action-panel"
aria-expanded="false"
data-ga-category="save_share"
data-ga-action="alert"
data-ga-label="cancel">
Cancel
</button>
</div>
<div class="action-panel-control-wrap rss-link-copy-wrap">
<label for="rss-link" class="usa-sr-only">RSS Link</label>
<input placeholder="Your RSS Feed Link" type="text" name="rss-link" id="rss-link" class="rss-link" title="RSS Link">
<button
type="button"
disabled
class="rss-link-copy-button disabled"
data-ga-category="save_share"
data-ga-action="rss"
data-ga-label="copy">
Copy
</button>
</div>
</form>
</div>
</div>
</div>
</div>
<div class="article-page" id="article-page" data-article-pmid="19819858">
<aside class="page-sidebar">
<div class="inner-wrap">
<div class="full-text-links">
<div class="full-view">
<h3 class="title">
Full text links
</h3>
<div class="full-text-links-list">
<a class="link-item
dialog-focus"
href="http://oem.bmj.com/lookup/pmidlookup?view=long&amp;pmid=19819858"
target="_blank"
rel="noopener"
ref="linksrc=fulltextorjournal_fulltext&amp;is_pmc=False&amp;PrId=3051&amp;itool=Abstract-def&amp;log$=linkouticon&amp;uid=19819858&amp;db=pubmed&amp;nlmid=9422759"
title="See full text options at HighWire"
data-ga-category="full_text"
data-ga-action="HighWire"
data-ga-label="19819858"
><img src="https://cdn.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--highwire.stanford.edu-icons-externalservices-pubmed-custom-bmjjournals_open_access.gif" alt="HighWire full text link"><span class="text">
HighWire
</span></a><a class="link-item
pmc
"
href="https://pmc.ncbi.nlm.nih.gov/articles/pmid/19819858/"
target="_blank"
rel="noopener"
ref="linksrc=fulltextorjournal_fulltext&amp;is_pmc=True&amp;PrId=3494&amp;itool=Abstract-def&amp;log$=linkouticon&amp;uid=19819858&amp;db=pubmed&amp;nlmid=9422759"
title="Free full text at PubMed Central"
data-ga-category="full_text"
data-ga-action="PMC"
data-ga-label="19819858"
><span class="text">
Free PMC article
</span></a>
</div>
</div>
<div class="short-view">
<a href="#" class="full-text-links-button full-text-links-dialog-trigger">
Full text links
</a>
</div>
</div>
<div class="actions-buttons sidebar"><h3 class="title">Actions</h3><div class="inner-wrap"><button class="citation-button citation-dialog-trigger"
aria-label="Open dialog with citation text in different styles"
data-ga-category="save_share"
data-ga-action="cite"
data-ga-label="open"
data-all-citations-url="/19819858/citations/"
data-citation-style="nlm"
data-pubmed-format-link="/19819858/export/"><span class="button-label">Cite</span></button><link type="text/css" href="ncbi-overlay-block/src/overlay-block.css"><div class="collections-button-container" data-article-id="19819858" data-article-db="pubmed"><button class="collections-button collections-dialog-trigger"
aria-label="Save article in MyNCBI collections."
data-ga-category="collections_button"
data-ga-action="click"
data-ga-label="collections_button"
data-collections-open-dialog-enabled="false"
data-collections-open-dialog-url="https://account.ncbi.nlm.nih.gov/?back_url=https%3A%2F%2Fpubmed.ncbi.nlm.nih.gov%2F19819858%2F%23open-collections-dialog"
data-in-collections="false"><span class="button-label">Collections</span></button><div class="overlay" role="dialog"><div id="collections-action-dialog"
class="dialog collections-dialog"
aria-hidden="true"><div class="title">Add to Collections</div><div class="collections-action-panel action-panel"><form id="collections-action-dialog-form"
class="collections-action-panel-form action-panel-content action-form action-panel-smaller-selectors"
data-existing-collections-url="/list-existing-collections/"
data-add-to-existing-collection-url="/add-to-existing-collection/"
data-create-and-add-to-new-collection-url="/create-and-add-to-new-collection/"
data-myncbi-max-collection-name-length="100"
data-collections-root-url="https://www.ncbi.nlm.nih.gov/myncbi/collections/"><input type="hidden" name="csrfmiddlewaretoken" value="Nl98KuHr7NOvDrCaNAucnKDp1vuqMgNT48TdnkaNHoBZxSI0qT7eRS93zzcCFRld"><div class="choice-group" role="radiogroup"><ul class="radio-group-items"><li><input type="radio"
id="collections-action-dialog-new"
class="collections-new"
name="collections"
value="new"
data-ga-category="collections_button"
data-ga-action="click"
data-ga-label="collections_radio_new"><label for="collections-action-dialog-new">Create a new collection</label></li><li><input type="radio"
id="collections-action-dialog-existing"
class="collections-existing"
name="collections"
value="existing"
checked="true"
data-ga-category="collections_button"
data-ga-action="click"
data-ga-label="collections_radio_existing"><label for="collections-action-dialog-existing">Add to an existing collection</label></li></ul></div><div class="controls-wrapper"><div class="action-panel-control-wrap new-collections-controls"><label for="collections-action-dialog-add-to-new" class="action-panel-label required-field-asterisk">
Name your collection:
</label><input
type="text"
name="add-to-new-collection"
id="collections-action-dialog-add-to-new"
class="collections-action-add-to-new"
pattern="[^&quot;&amp;=&lt;&gt;\/]*" title="The following characters are not allowed in the Name field: &quot;&amp;=&lt;&gt;/"
maxlength="100"
data-ga-category="collections_button"
data-ga-action="create_collection"
data-ga-label="non_favorties_collection"><div class="collections-new-name-too-long usa-input-error-message selection-validation-message">
Name must be less than 100 characters
</div></div><div class="action-panel-control-wrap existing-collections-controls"><label for="collections-action-dialog-add-to-existing" class="action-panel-label">
Choose a collection:
</label><select id="collections-action-dialog-add-to-existing"
class="action-panel-selector collections-action-add-to-existing"
data-ga-category="collections_button"
data-ga-action="select_collection"
data-ga-label="($('.collections-action-add-to-existing').val() === 'Favorites') ? 'Favorites' : 'non_favorites_collection'"></select><div class="collections-retry-load-on-error usa-input-error-message selection-validation-message">
Unable to load your collection due to an error<br><a href="#">Please try again</a></div></div></div><div class="action-panel-actions"><button class="action-panel-submit"
type="submit"
data-loading-label="Adding..."
data-pinger-ignore
data-ga-category="collections_button"
data-ga-action="click"
data-ga-label="add">
Add
</button><button class="action-panel-cancel"
aria-label="Close 'Add to Collections' panel"
ref="linksrc=close_collections_panel"
aria-controls="collections-action-panel"
aria-expanded="false"
data-ga-category="collections_button"
data-ga-action="click"
data-ga-label="cancel">
Cancel
</button></div></form></div></div></div></div><button class="more-actions-button more-actions-dialog-trigger"
title="Open dialog with more actions to take"
ref="linksrc=more_actions_btn"></button><div class="display-options" data-format-key="format"
data-default-format-value="abstract"
data-current-format-value="abstract" role="region"><button
class="trigger usa-button"
title="Change format"
data-ga-category="display_options"
data-ga-action="display_options_dialog"><span class="button-label">Display options</span></button><div class="dropdown" hidden><div class="title">
Display options
</div><div class="content"><div class="format-container"><span class="option-label">
Format
</span><select name="format" data-initial-value="abstract" aria-label="Display format" id="sidebar-actions-display-format"><option value="abstract">Abstract</option><option value="pubmed">PubMed</option><option value="pmid">PMID</option></select></div></div></div></div></div></div>
<div class="social-sharing">
<h3 class="title">
Share
</h3>
<ul class="social-sharing-links usa-unstyled-list">
<li>
<a href="http://twitter.com/intent/tweet?text=Search%20strings%20for%20the%20study%20of%20putative%20occupational%20determinants%20of%20disease%20https%3A//pubmed.ncbi.nlm.nih.gov/19819858/"
class="share-link share-link-twitter"
rel="noreferrer noopener"
target="Pubmed-Social-Media-Share-Popup"
title="Share article on Twitter"
data-ga-category="save_share"
data-ga-action="social"
data-ga-label="twitter"></a>
</li>
<li>
<a href="http://www.facebook.com/sharer/sharer.php?u=https%3A//pubmed.ncbi.nlm.nih.gov/19819858/"
class="share-link share-link-facebook"
rel="noreferrer noopener"
target="Pubmed-Social-Media-Share-Popup"
title="Share article on Facebook"
data-ga-category="save_share"
data-ga-action="social"
data-ga-label="fb"></a>
</li>
<li>
<div class="share-permalink">
<button class="trigger"
title="Show article permalink"
ref="linksrc=show_permalink_btn">
</button>
<div class="dropdown" hidden>
<div class="title">
Permalink
</div>
<div class="content">
<input type="text"
class="permalink-text"
value="https://pubmed.ncbi.nlm.nih.gov/19819858/"
aria-label="Article permalink"/><button class="permalink-copy-button usa-button-primary"
title="Copy article permalink"
data-ga-category="save_share"
data-ga-action="link"
data-ga-label="copy_link"><span class="button-title">Copy</span></button>
</div>
</div>
</div>
</li>
</ul>
</div>
<nav class="page-navigator" role="navigation" aria-label="Page navigation">
<div class="full-view">
<h3 class="title">
Page navigation
</h3>
<ul class="items-list">
<li class="heading ">
<a href="#heading"
aria-label="navigate to Title &amp; authors section"
data-ga-category="page_nav"
data-ga-action="heading">
Title &amp; authors
</a>
</li>
<li class="linked-correction-forward current">
<a href="#linked-correction-forward"
aria-label="navigate to Erratum in section"
data-ga-category="page_nav"
data-ga-action="linked-correction-forward">
Erratum in
</a>
</li>
<li class="abstract ">
<a href="#abstract"
aria-label="navigate to Abstract section"
data-ga-category="page_nav"
data-ga-action="abstract">
Abstract
</a>
</li>
<li class="conflict-of-interest ">
<a href="#conflict-of-interest"
aria-label="navigate to Conflict of interest statement section"
data-ga-category="page_nav"
data-ga-action="conflict-of-interest">
Conflict of interest statement
</a>
</li>
<li class="figures ">
<a href="#figures"
aria-label="navigate to Figures section"
data-ga-category="page_nav"
data-ga-action="figures">
Figures
</a>
</li>
<li class="similar ">
<a href="#similar"
aria-label="navigate to Similar articles section"
data-ga-category="page_nav"
data-ga-action="similar">
Similar articles
</a>
</li>
<li class="citedby ">
<a href="#citedby"
aria-label="navigate to Cited by section"
data-ga-category="page_nav"
data-ga-action="citedby">
Cited by
</a>
</li>
<li class="references ">
<a href="#references"
aria-label="navigate to References section"
data-ga-category="page_nav"
data-ga-action="references">
References
</a>
</li>
<li class="publication-types ">
<a href="#publication-types"
aria-label="navigate to Publication types section"
data-ga-category="page_nav"
data-ga-action="publication-types">
Publication types
</a>
</li>
<li class="mesh-terms ">
<a href="#mesh-terms"
aria-label="navigate to MeSH terms section"
data-ga-category="page_nav"
data-ga-action="mesh-terms">
MeSH terms
</a>
</li>
<li class="related-links ">
<a href="#related-links"
aria-label="navigate to Related information section"
data-ga-category="page_nav"
data-ga-action="related-links">
Related information
</a>
</li>
<li class="linkout ">
<a href="#linkout"
aria-label="navigate to LinkOut - more resources section"
data-ga-category="page_nav"
data-ga-action="linkout">
LinkOut - more resources
</a>
</li>
</ul>
</div>
<select class="short-view" autocomplete="off" title="navigate to selected section" aria-label="Navigate to page section">
<option value="heading">Title &amp; authors</option>
<option value="linked-correction-forward">Erratum in</option>
<option value="abstract">Abstract</option>
<option value="conflict-of-interest">Conflict of interest statement</option>
<option value="figures">Figures</option>
<option value="similar">Similar articles</option>
<option value="citedby">Cited by</option>
<option value="references">References</option>
<option value="publication-types">Publication types</option>
<option value="mesh-terms">MeSH terms</option>
<option value="related-links">Related information</option>
<option value="linkout">LinkOut - more resources</option>
</select>
</nav>
</div>
</aside>
<main class="article-details" id="article-details">
<!-- "Filters applied" shows only when page is redirected from search -->
<!-- because search found one result -->
<header class="heading" id="heading">
<div class="full-view" id="full-view-heading">
<div class="article-citation">
<div class="article-source">
<div class="journal-actions dropdown-block"><button id="full-view-journal-trigger"
class="journal-actions-trigger trigger"
ref="linksrc=journal_actions_btn"
title="Occupational and environmental medicine"
tabindex="0"
aria-controls="full-view-journal"
aria-expanded="false"
aria-label="Toggle dropdown menu for journal Occupational and environmental medicine"
data-pinger-ignore>
Occup Environ Med
</button><div id="full-view-journal"
class="journal-actions-dropdown dropdown dropdown-container"
hidden
aria-label="Dropdown menu for journal Occupational and environmental medicine"><div class="title">Actions</div><div class="content"><ul class="journal-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link"
href="/?term=%22Occup+Environ+Med%22%5Bjour%5D&amp;sort=date&amp;sort_order=desc"
data-href="/?term=%22Occup+Environ+Med%22%5Bjour%5D&amp;sort=date&amp;sort_order=desc"
ref="linksrc=search_in_pubmed_journal_name_link&amp;journal_abbrev=Occup Environ Med"
data-ga-category="search"
data-ga-action="journal_link"
data-ga-label="Occup Environ Med">
Search in PubMed
</a></li><li><a class="search-in-nlm-catalog-link dropdown-block-link"
ref ="linksrc=search_in_nlm_catalog_link"
href="https://www.ncbi.nlm.nih.gov/nlmcatalog?term=%22Occup+Environ+Med%22%5BTitle+Abbreviation%5D"
data-ga-category="search_catalog"
data-ga-action="journal_link"
data-ga-label="Occup Environ Med">
Search in NLM Catalog
</a></li><li><a class="add-to-search-link dropdown-block-link"
ref ="linksrc=add_to_search_link"
role="button"
data-search-term='"Occup Environ Med"[jour]'
data-ga-category="search"
data-ga-action="add_to_search"
data-ga-label='"Occup Environ Med"[jour]'
href="#">
Add to Search
</a></li></ul></div></div></div><span class="period">. </span><span class="cit">2010 Jul;67(7):436-43.</span>
</div>
<span class="citation-doi">
doi: 10.1136/oem.2008.044727.
</span>
<span class="secondary-date">
Epub 2009 Oct 9.
</span>
</div>
<h1 class="heading-title">
Search strings for the study of putative occupational determinants of disease
</h1>
<div class="inline-authors">
<div class="authors">
<div class="authors-list">
<span class="authors-list-item "><a class="full-name"
href="/?term=Mattioli+S&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Stefano Mattioli">Stefano Mattioli</a><sup class="affiliation-links"><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="Unità Operativa di Medicina del Lavoro, Dipartimento di Medicina Interna, dell&#x27;Invecchiamento e Malattie Nefrologiche, Università di Bologna, Policlinico S. Orsola-Malpighi, Via Pelagio Palagi 9, Bologna, Italy." href="#full-view-affiliation-1" ref="linksrc=author_aff">
1
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Zanardi+F&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Francesca Zanardi">Francesca Zanardi</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Baldasseroni+A&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Alberto Baldasseroni">Alberto Baldasseroni</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Schaafsma+F&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Frederieke Schaafsma">Frederieke Schaafsma</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Cooke+RM&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Robin M T Cooke">Robin M T Cooke</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Mancini+G&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Gianpiero Mancini">Gianpiero Mancini</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Fierro+M&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Mauro Fierro">Mauro Fierro</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Santangelo+C&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Chiara Santangelo">Chiara Santangelo</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Farioli+A&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Andrea Farioli">Andrea Farioli</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Fucksia+S&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Serenella Fucksia">Serenella Fucksia</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Curti+S&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Stefania Curti">Stefania Curti</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Violante+FS&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Francesco S Violante">Francesco S Violante</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Verbeek+J&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Jos Verbeek">Jos Verbeek</a></span>
</div>
</div>
</div>
<div class="short-article-details">
Affiliations
<button
class="more-details"
id="toggle-authors"
data-alt-text="Collapse"
aria-controls="expanded-authors"
aria-expanded="false"
data-pinger-ignore
data-fetch-url="/19819858/long-authors/"
data-id-prefix="">
<span class="title">
Expand
</span>
</button>
</div>
<div class="extended-article-details" id="expanded-authors" aria-hidden="true">
<div class="expanded-authors" id="full-view-expanded-authors">
<div class="affiliations">
<h3 class="title">
Affiliation
</h3>
<ul class="item-list">
<li data-affiliation-id="full-view-affiliation-1"
id="full-view-affiliation-1"
><sup class="key">1</sup> Unità Operativa di Medicina del Lavoro, Dipartimento di Medicina Interna, dell&#x27;Invecchiamento e Malattie Nefrologiche, Università di Bologna, Policlinico S. Orsola-Malpighi, Via Pelagio Palagi 9, Bologna, Italy.</li>
</ul>
</div>
</div>
</div>
<ul class="identifiers" id="full-view-identifiers">
<li>
<span class="identifier pubmed">
<span class="id-label">
PMID:
</span>
<strong class="current-id" title="PubMed ID">19819858</strong>
</span>
</li>
<li>
<span class="identifier pmc">
<span class="id-label">
PMCID:
</span>
<a class="id-link"
target="_blank"
rel="noopener"
ref="linksrc=article_id_link&amp;article_id=PMC2989170&amp;id_type=PMC"
href="https://pmc.ncbi.nlm.nih.gov/articles/PMC2989170/"
data-ga-category="full_text"
data-ga-action="PMCID"
>
PMC2989170
</a>
</span>
</li>
<li>
<span class="identifier doi">
<span class="id-label">
DOI:
</span>
<a class="id-link"
target="_blank"
rel="noopener"
ref="linksrc=article_id_link&amp;article_id=10.1136/oem.2008.044727&amp;id_type=DOI"
href="https://doi.org/10.1136/oem.2008.044727"
data-ga-category="full_text"
data-ga-action="DOI"
>
10.1136/oem.2008.044727
</a>
</span>
</li>
</ul>
<div class="in-clipboard-label " hidden>
Item in Clipboard
</div>
</div>
<div class="short-view" id="short-view-heading">
<h1 class="heading-title">
Search strings for the study of putative occupational determinants of disease
</h1>
<div class="short-citation">
<span class="authors-list">
<span class="authors-list-item "><span class="full-name">Stefano Mattioli</span><span class="citation-separator">&nbsp;et al.</span></span>
</span>
<span class="citation-journal">
Occup Environ Med<span class="citation-separator">.</span>
</span>
<span class="date">
<span class="citation-year">2010 Jul</span><span class="citation-separator">.</span>
</span>
</div>
<div class="more-article-details-section with-display-settings">
<button class="more-article-details"
id="toggle-article-details"
data-alt-text="Hide details"
ref="linksrc=toggle_article_details"
aria-controls="full-article-details"
aria-expanded="false"
data-fetch-url="/19819858/long-authors/"
data-id-prefix="">
<span class="title">Show details</span>
</button>
<div class="display-options" data-format-key="format"
data-default-format-value="abstract"
data-current-format-value="abstract" role="region">
<button
class="trigger usa-button"
title="Change format"
data-ga-category="display_options"
data-ga-action="display_options_dialog">
<span class="button-label">Display options</span>
</button>
<div class="dropdown" hidden>
<div class="title">
Display options
</div>
<div class="content">
<div class="format-container">
<span class="option-label">
Format
</span>
<select name="format" data-initial-value="abstract" aria-label="Display format" id="mobile-display-format">
<option value="abstract">Abstract</option>
<option value="pubmed">PubMed</option>
<option value="pmid">PMID</option>
</select>
</div>
</div>
</div>
</div>
</div>
<div class="extended-article-details" id="full-article-details" aria-hidden="true">
<div class="article-citation">
<div class="article-source">
<div class="journal-actions dropdown-block"><button id="short-view-journal-trigger"
class="journal-actions-trigger trigger"
ref="linksrc=journal_actions_btn"
title="Occupational and environmental medicine"
tabindex="0"
aria-controls="short-view-journal"
aria-expanded="false"
aria-label="Toggle dropdown menu for journal Occupational and environmental medicine"
data-pinger-ignore>
Occup Environ Med
</button><div id="short-view-journal"
class="journal-actions-dropdown dropdown dropdown-container"
hidden
aria-label="Dropdown menu for journal Occupational and environmental medicine"><div class="title">Actions</div><div class="content"><ul class="journal-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link"
href="/?term=%22Occup+Environ+Med%22%5Bjour%5D&amp;sort=date&amp;sort_order=desc"
data-href="/?term=%22Occup+Environ+Med%22%5Bjour%5D&amp;sort=date&amp;sort_order=desc"
ref="linksrc=search_in_pubmed_journal_name_link&amp;journal_abbrev=Occup Environ Med"
data-ga-category="search"
data-ga-action="journal_link"
data-ga-label="Occup Environ Med">
Search in PubMed
</a></li><li><a class="search-in-nlm-catalog-link dropdown-block-link"
ref ="linksrc=search_in_nlm_catalog_link"
href="https://www.ncbi.nlm.nih.gov/nlmcatalog?term=%22Occup+Environ+Med%22%5BTitle+Abbreviation%5D"
data-ga-category="search_catalog"
data-ga-action="journal_link"
data-ga-label="Occup Environ Med">
Search in NLM Catalog
</a></li><li><a class="add-to-search-link dropdown-block-link"
ref ="linksrc=add_to_search_link"
role="button"
data-search-term='"Occup Environ Med"[jour]'
data-ga-category="search"
data-ga-action="add_to_search"
data-ga-label='"Occup Environ Med"[jour]'
href="#">
Add to Search
</a></li></ul></div></div></div><span class="period">. </span><span class="cit">2010 Jul;67(7):436-43.</span>
</div>
<span class="citation-doi">
doi: 10.1136/oem.2008.044727.
</span>
<span class="secondary-date">
Epub 2009 Oct 9.
</span>
</div>
<div class="expanded-authors" id="short-view-expanded-authors">
<div class="authors">
<h3 class="title">
Authors
</h3>
<div class="authors-list">
<span class="authors-list-item "><a class="full-name"
href="/?term=Mattioli+S&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Stefano Mattioli">Stefano Mattioli</a><sup class="affiliation-links"><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="Unità Operativa di Medicina del Lavoro, Dipartimento di Medicina Interna, dell&#x27;Invecchiamento e Malattie Nefrologiche, Università di Bologna, Policlinico S. Orsola-Malpighi, Via Pelagio Palagi 9, Bologna, Italy." href="#short-view-affiliation-1" ref="linksrc=author_aff">
1
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Zanardi+F&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Francesca Zanardi">Francesca Zanardi</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Baldasseroni+A&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Alberto Baldasseroni">Alberto Baldasseroni</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Schaafsma+F&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Frederieke Schaafsma">Frederieke Schaafsma</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Cooke+RM&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Robin M T Cooke">Robin M T Cooke</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Mancini+G&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Gianpiero Mancini">Gianpiero Mancini</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Fierro+M&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Mauro Fierro">Mauro Fierro</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Santangelo+C&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Chiara Santangelo">Chiara Santangelo</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Farioli+A&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Andrea Farioli">Andrea Farioli</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Fucksia+S&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Serenella Fucksia">Serenella Fucksia</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Curti+S&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Stefania Curti">Stefania Curti</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Violante+FS&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Francesco S Violante">Francesco S Violante</a><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Verbeek+J&amp;cauthor_id=19819858"
ref="linksrc=author_name_link"
data-ga-category="search"
data-ga-action="author_link"
data-ga-label="Jos Verbeek">Jos Verbeek</a></span>
</div>
</div>
<div class="affiliations">
<h3 class="title">
Affiliation
</h3>
<ul class="item-list">
<li data-affiliation-id="short-view-affiliation-1"
id="short-view-affiliation-1"
><sup class="key">1</sup> Unità Operativa di Medicina del Lavoro, Dipartimento di Medicina Interna, dell&#x27;Invecchiamento e Malattie Nefrologiche, Università di Bologna, Policlinico S. Orsola-Malpighi, Via Pelagio Palagi 9, Bologna, Italy.</li>
</ul>
</div>
</div>
<ul class="identifiers" id="short-view-identifiers">
<li>
<span class="identifier pubmed">
<span class="id-label">
PMID:
</span>
<strong class="current-id" title="PubMed ID">19819858</strong>
</span>
</li>
<li>
<span class="identifier pmc">
<span class="id-label">
PMCID:
</span>
<a class="id-link"
target="_blank"
rel="noopener"
ref="linksrc=article_id_link&amp;article_id=PMC2989170&amp;id_type=PMC"
href="https://pmc.ncbi.nlm.nih.gov/articles/PMC2989170/"
data-ga-category="full_text"
data-ga-action="PMCID"
>
PMC2989170
</a>
</span>
</li>
<li>
<span class="identifier doi">
<span class="id-label">
DOI:
</span>
<a class="id-link"
target="_blank"
rel="noopener"
ref="linksrc=article_id_link&amp;article_id=10.1136/oem.2008.044727&amp;id_type=DOI"
href="https://doi.org/10.1136/oem.2008.044727"
data-ga-category="full_text"
data-ga-action="DOI"
>
10.1136/oem.2008.044727
</a>
</span>
</li>
</ul>
<div class="in-clipboard-label " hidden>
Item in Clipboard
</div>
</div>
</div>
</header>
<div class="actions-buttons inline"><div class="inner-wrap"><button class="full-text-links-button full-text-links-dialog-trigger"
title="Open dialog with full text links"
ref="linksrc=full_text_links">
Full text links
</button><button class="citation-button citation-dialog-trigger"
aria-label="Open dialog with citation text in different styles"
data-ga-category="save_share"
data-ga-action="cite"
data-ga-label="open"
data-all-citations-url="/19819858/citations/"
data-citation-style="nlm"
data-pubmed-format-link="/19819858/export/"><span class="button-label">Cite</span></button><button class="more-actions-button more-actions-dialog-trigger"
title="Open dialog with more actions to take"
ref="linksrc=more_actions_btn"></button><div class="display-options" data-format-key="format"
data-default-format-value="abstract"
data-current-format-value="abstract" role="region"><button
class="trigger usa-button"
title="Change format"
data-ga-category="display_options"
data-ga-action="display_options_dialog"><span class="button-label">Display options</span></button><div class="dropdown" hidden><div class="title">
Display options
</div><div class="content"><div class="format-container"><span class="option-label">
Format
</span><select name="format" data-initial-value="abstract" aria-label="Display format" id="inline-actions-display-format"><option value="abstract">Abstract</option><option value="pubmed">PubMed</option><option value="pmid">PMID</option></select></div></div></div></div></div></div>
<div class="linked-articles" id="linked-correction-forward">
<h2 class="title">
Erratum in
</h2>
<ul class="item-list usa-unstyled-list">
<li class="raw-citation">Occup Environ Med. 2010 Nov;67(11):99</li>
</ul>
</div>
<div class="abstract" id="abstract">
<h2 class="title">
Abstract
</h2>
<div class="abstract-content selected"
id="eng-abstract">
<p>
<strong class="sub-title">
Objective:
</strong>
To identify efficient PubMed search strategies to retrieve articles regarding putative occupational determinants of conditions not generally considered to be work related.
</p>
<p>
<strong class="sub-title">
Methods:
</strong>
Based on MeSH definitions and expert knowledge, we selected as candidate search terms the four MeSH terms describing 'occupational disease', 'occupational exposure', 'occupational health' and 'occupational medicine' (DEHM) alongside 22 other promising terms. We first explored overlaps between the candidate terms in PubMed. Using random samples of abstracts retrieved by each term, we estimated the proportions of articles containing potentially pertinent information regarding occupational aetiology in order to formulate two search strategies (one more 'specific', one more 'sensitive'). We applied these strategies to retrieve information on the possible occupational aetiology of meningioma, pancreatitis and atrial fibrillation.
</p>
<p>
<strong class="sub-title">
Results:
</strong>
Only 20.3% of abstracts were retrieved by more than one DEHM term. The more 'specific' search string was based on the combination of terms that yielded the highest proportion (40%) of potentially pertinent abstracts. The more 'sensitive' string was based on the use of broader search fields and additional coverage provided by other search terms under study. Using the specific string, the numbers of abstracts needed to read to find one potentially pertinent article were 1.2 for meningioma, 1.9 for pancreatitis and 1.8 for atrial fibrillation. Using the sensitive strategy, the numbers needed to read were 4.4 for meningioma, 8.9 for pancreatitis and 10.5 for atrial fibrillation.
</p>
<p>
<strong class="sub-title">
Conclusions:
</strong>
The proposed strings could help health care professionals explore putative occupational aetiology for diseases that are not generally thought to be work related.
</p>
</div>
</div>
<p class="disclaimer" id="disclaimer">
<a href="/disclaimer/" target="_blank" data-ga-category="literature_resources"
data-ga-action="disclaimer_link" data-ga-label="under_abstract">PubMed Disclaimer</a>
</p>
<div class="conflict-of-interest" id="conflict-of-interest">
<h2 class="title">
Conflict of interest statement
</h2>
<div class="statement">
<p xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:p1="http://pubmed.gov/pub-one"><bold>Competing interests:</bold> None.</p>
</div>
</div>
<div class="figures" id="figures">
<h2 class="title">
Figures
</h2>
<div class="figures-list" id="slides-container"
itemscope itemtype="http://schema.org/ImageGallery">
<figure class="figure-item "
itemscope itemtype="http://schema.org/ImageObject"
itemprop="associatedMedia"
data-slide-index="0"
data-label-slug="figure-1">
<a class="figure-link"
href="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/87ee/2989170/d063977e52dd/oemed44727fig1.jpg"
itemprop="contentUrl"
aria-describedby="figure-caption-0"
role="button"
data-image-width="412"
data-image-height="256"
data-image-alt="Figure 1"
data-pmc-id="PMC2989170"
data-figure-id="fig1">
<img class="figure-thumb" itemprop="thumbnail"
id="article-image-0"
src="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/87ee/2989170/b73d10b4df9f/oemed44727fig1.gif"
alt="Figure 1" />
</a>
<meta itemprop="width" itemtype="http://schema.org/ImageObject" content="412">
<meta itemprop="height" itemtype="http://schema.org/ImageObject" content="256">
<div class="figure-caption figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="caption" aria-hidden="true">
<div class="caption-wrap">
<strong class="figure-label">
<p> Figure 1 </p>
</strong>
<div class="figure-caption-contents"><p> Proportional Venn diagram representing numbers… </p></div>
</div>
</div>
<div class="figure-caption-medium figure-caption-text" aria-hidden="true">
<strong class="figure-label">
<p> Figure 1 </p>
</strong>
<div class="figure-caption-contents"><p> Proportional Venn diagram representing numbers of abstracts retrieved from PubMed using different possible… </p></div>
</div>
<figcaption id="figure-caption-0" class="figure-caption-full figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="description">
<strong class="figure-label">
Figure 1
</strong>
<div class="figure-caption-contents">Proportional Venn diagram representing numbers of abstracts retrieved from PubMed using different possible combinations of the DEHM terms (<i>occupational diseases</i>, <i>occupational exposure</i>, <i>occupational health</i> and <i>occupational medicine</i>) using [MeSH Terms] OR [Text Word]).</div>
</figcaption>
</figure>
<figure class="figure-item "
itemscope itemtype="http://schema.org/ImageObject"
itemprop="associatedMedia"
data-slide-index="1"
data-label-slug="figure-2">
<a class="figure-link"
href="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/87ee/2989170/456461c35817/oemed44727fig2.jpg"
itemprop="contentUrl"
aria-describedby="figure-caption-1"
role="button"
data-image-width="412"
data-image-height="537"
data-image-alt="Figure 2"
data-pmc-id="PMC2989170"
data-figure-id="fig2">
<img class="figure-thumb" itemprop="thumbnail"
id="article-image-1"
src="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/87ee/2989170/09d64bdfb102/oemed44727fig2.gif"
alt="Figure 2" />
</a>
<meta itemprop="width" itemtype="http://schema.org/ImageObject" content="412">
<meta itemprop="height" itemtype="http://schema.org/ImageObject" content="537">
<div class="figure-caption figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="caption" aria-hidden="true">
<div class="caption-wrap">
<strong class="figure-label">
<p> Figure 2 </p>
</strong>
<div class="figure-caption-contents"><p> Bar chart showing the limited… </p></div>
</div>
</div>
<div class="figure-caption-medium figure-caption-text" aria-hidden="true">
<strong class="figure-label">
<p> Figure 2 </p>
</strong>
<div class="figure-caption-contents"><p> Bar chart showing the limited incremental contribution of the [Text Word] and [All… </p></div>
</div>
<figcaption id="figure-caption-1" class="figure-caption-full figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="description">
<strong class="figure-label">
Figure 2
</strong>
<div class="figure-caption-contents">Bar chart showing the limited incremental contribution of the [Text Word] and [All Fields] search fields* for retrieval of potentially relevant articles when entering the entire DEHM group of MeSH terms (ie, <i>occupational diseases</i> OR <i>occupational exposure</i> OR <i>occupational health</i> OR <i>occupational medicine</i>) using different search fields: (a) [MeSH Terms]; (b) [Text Word] NOT [MeSH Terms]; (c) [All Fields] NOT ([MeSH Terms] OR [Text Word]). *To search a MeSH term using the [All Fields] option, it is necessary to enter the term in inverted commas (eg, <i>occupational diseases</i>).</div>
</figcaption>
</figure>
</div>
<!-- Root element of PhotoSwipe. Must have class pswp. -->
<div class="pswp figures-dialog" id="figures-dialog" tabindex="-1" role="dialog" aria-hidden="true"
data-image-gallery-uid="article-figures" aria-label="Figures Dialog">
<!-- Background of PhotoSwipe.
It's a separate element as animating opacity is faster than rgba(). -->
<div class="pswp__bg"></div>
<!-- Slides wrapper with overflow:hidden. -->
<div class="pswp__scroll-wrap">
<!-- Container that holds slides.
PhotoSwipe keeps only 3 of them in the DOM to save memory.
Don't modify these 3 pswp__item elements, data is added later on. -->
<div class="pswp__container">
<div class="pswp__item"></div>
<div class="pswp__item"></div>
<div class="pswp__item"></div>
</div>
<!-- Default (PhotoSwipeUI_Default) interface on top of sliding area. Can be changed. -->
<div class="pswp__ui pswp__ui--hidden">
<div class="pswp__top-bar">
<!-- Controls are self-explanatory. Order can be changed. -->
<div class="pswp__counter"></div>
<button class="pswp__button pswp__button--close" title="Close (Esc)"></button>
<button class="pswp__button pswp__button--share" title="Share"></button>
<button class="pswp__button pswp__button--fs" title="Toggle fullscreen"></button>
<button class="pswp__button pswp__button--zoom" title="Zoom in/out"></button>
<!-- Preloader demo http://codepen.io/dimsemenov/pen/yyBWoR -->
<!-- element will get class pswp__preloader--active when preloader is running -->
<div class="pswp__preloader">
<div class="pswp__preloader__icn">
<div class="pswp__preloader__cut">
<div class="pswp__preloader__donut"></div>
</div>
</div>
</div>
</div>
<div class="pswp__share-modal pswp__share-modal--hidden pswp__single-tap">
<div class="pswp__share-tooltip"></div>
</div>
<button class="pswp__button pswp__button--arrow--left" title="Previous (arrow left)">
</button>
<button class="pswp__button pswp__button--arrow--right" title="Next (arrow right)">
</button>
<div class="pswp__caption">
<div class="pswp__caption__center"></div>
</div>
</div>
</div>
</div>
<div class="figure-dialog-caption">
<div class="figure-caption-link-container">
<a class="figure-caption-link" href="#">See this image and copyright information in PMC</a>
</div>
<div class="figure-caption-center"
data-expand-title="click to show full caption"
data-collapse-title="click to hide full caption">
</div>
<button class="figure-caption-toggle-btn"
aria-label="show full caption"
data-expand-text="show full caption"
data-collapse-text="hide full caption">
<!-- Dynamic text -->
</button>
</div>
</div>
<div class="similar-articles" id="similar">
<h2 class="title">
Similar articles
</h2>
<ul class="articles-list" id="similar-articles-list">
<li class="full-docsum">
<div class="docsum-content" style="display:inline;">
<a class="docsum-title"
href="/24019168/"
ref="article_id=24019168&amp;linksrc=similar_articles_link&amp;ordinalpos=1"
data-ga-category="similar_article"
data-ga-action="24019168"
data-ga-label="">
PubMed search strings for the study of agricultural workers' diseases.
</a>
<div class="docsum-citation full-citation">
<span class="docsum-authors full-authors">Mattioli S, Gori D, Di Gregori V, Ricotta L, Baldasseroni A, Farioli A, Zanardi F, Galletti S, Colosio C, Curti S, Violante FS.</span>
<span class="docsum-authors short-authors">Mattioli S, et al.</span>
<span class="docsum-journal-citation full-journal-citation">Am J Ind Med. 2013 Dec;56(12):1473-81. doi: 10.1002/ajim.22252. Epub 2013 Sep 6.</span>
<span class="docsum-journal-citation short-journal-citation">Am J Ind Med. 2013.</span>
<span class="citation-part">PMID: <span class="docsum-pmid">24019168</span></span>
</div>
</div>
</li>
<li class="full-docsum">
<div class="docsum-content" style="display:inline;">
<a class="docsum-title"
href="/28003291/"
ref="article_id=28003291&amp;linksrc=similar_articles_link&amp;ordinalpos=2"
data-ga-category="similar_article"
data-ga-action="28003291"
data-ga-label="">
PubMed search filters for the study of putative outdoor air pollution determinants of disease.
</a>
<div class="docsum-citation full-citation">
<span class="docsum-authors full-authors">Curti S, Gori D, Di Gregori V, Farioli A, Baldasseroni A, Fantini MP, Christiani DC, Violante FS, Mattioli S.</span>
<span class="docsum-authors short-authors">Curti S, et al.</span>
<span class="docsum-journal-citation full-journal-citation">BMJ Open. 2016 Dec 21;6(12):e013092. doi: 10.1136/bmjopen-2016-013092.</span>
<span class="docsum-journal-citation short-journal-citation">BMJ Open. 2016.</span>
<span class="citation-part">PMID: <span class="docsum-pmid">28003291</span></span>
<span class="free-resources spaced-citation-item citation-part">Free PMC article.</span>
</div>
</div>
</li>
<li class="full-docsum">
<div class="docsum-content" style="display:inline;">
<a class="docsum-title"
href="/23196809/"
ref="article_id=23196809&amp;linksrc=similar_articles_link&amp;ordinalpos=3"
data-ga-category="similar_article"
data-ga-action="23196809"
data-ga-label="">
PubMed search strategies for the identification of etiologic associations between hypothalamic-pituitary disorders and other medical conditions.
</a>
<div class="docsum-citation full-citation">
<span class="docsum-authors full-authors">Guaraldi F, Grottoli S, Arvat E, Mattioli S, Ghigo E, Gori D.</span>
<span class="docsum-authors short-authors">Guaraldi F, et al.</span>
<span class="docsum-journal-citation full-journal-citation">Pituitary. 2013 Dec;16(4):471-82. doi: 10.1007/s11102-012-0443-3.</span>
<span class="docsum-journal-citation short-journal-citation">Pituitary. 2013.</span>
<span class="citation-part">PMID: <span class="docsum-pmid">23196809</span></span>
</div>
</div>
</li>
<li class="full-docsum">
<div class="docsum-content" style="display:inline;">
<a class="docsum-title"
href="/25499192/"
ref="article_id=25499192&amp;linksrc=similar_articles_link&amp;ordinalpos=4"
data-ga-category="similar_article"
data-ga-action="25499192"
data-ga-label="">
Using PubMed search strings for efficient retrieval of manual therapy research literature.
</a>
<div class="docsum-citation full-citation">
<span class="docsum-authors full-authors">Pillastrini P, Vanti C, Curti S, Mattioli S, Ferrari S, Violante FS, Guccione A.</span>
<span class="docsum-authors short-authors">Pillastrini P, et al.</span>
<span class="docsum-journal-citation full-journal-citation">J Manipulative Physiol Ther. 2015 Feb;38(2):159-66. doi: 10.1016/j.jmpt.2014.11.005. Epub 2014 Dec 12.</span>
<span class="docsum-journal-citation short-journal-citation">J Manipulative Physiol Ther. 2015.</span>
<span class="citation-part">PMID: <span class="docsum-pmid">25499192</span></span>
<span class="publication-type spaced-citation-item citation-part">Review.</span>
</div>
</div>
</li>
<li class="full-docsum">
<div class="docsum-content" style="display:inline;">
<a class="docsum-title"
href="/17460797/"
ref="article_id=17460797&amp;linksrc=similar_articles_link&amp;ordinalpos=5"
data-ga-category="similar_article"
data-ga-action="17460797"
data-ga-label="">
Immigrant populations, work and health--a systematic literature review.
</a>
<div class="docsum-citation full-citation">
<span class="docsum-authors full-authors">Ahonen EQ, Benavides FG, Benach J.</span>
<span class="docsum-authors short-authors">Ahonen EQ, et al.</span>
<span class="docsum-journal-citation full-journal-citation">Scand J Work Environ Health. 2007 Apr;33(2):96-104. doi: 10.5271/sjweh.1112.</span>
<span class="docsum-journal-citation short-journal-citation">Scand J Work Environ Health. 2007.</span>
<span class="citation-part">PMID: <span class="docsum-pmid">17460797</span></span>
<span class="publication-type spaced-citation-item citation-part">Review.</span>
</div>
</div>
</li>
</ul>
<div class="actions-bar">
<a
class="show-all-linked-articles"
data-href="/?linkname=pubmed_pubmed&from_uid=19819858"
data-ga-category="similar_article"
data-ga-action="show_all"
>
See all similar articles
</a>
</div>
</div>
<div class="citedby-articles" id="citedby">
<h2 class="title">
Cited by
</h2>
<ul class="articles-list" id="citedby-articles-list">
<li class="full-docsum">
<div class="docsum-content" style="display:inline;">
<a class="docsum-title"
href="/34446682/"
ref="article_id=34446682&amp;linksrc=citedby_articles_link&amp;ordinalpos=1"
data-ga-category="cited_by"
data-ga-action="34446682"
data-ga-label="">
Effectiveness of preventive interventions and Randomised Controlled Trials in Occupational Health: an overview of the last five decades.
</a>
<div class="docsum-citation full-citation">
<span class="docsum-authors full-authors">Mattioli S, Verbeek J, Mattei S, Curti S.</span>
<span class="docsum-authors short-authors">Mattioli S, et al.</span>
<span class="docsum-journal-citation full-journal-citation">Med Lav. 2021 Aug 26;112(4):258-263. doi: 10.23749/mdl.v112i4.12106.</span>
<span class="docsum-journal-citation short-journal-citation">Med Lav. 2021.</span>
<span class="citation-part">PMID: <span class="docsum-pmid">34446682</span></span>
<span class="free-resources spaced-citation-item citation-part">Free PMC article.</span>
<span class="publication-type spaced-citation-item citation-part">Review.</span>
</div>
</div>
</li>
<li class="full-docsum">
<div class="docsum-content" style="display:inline;">
<a class="docsum-title"
href="/30191305/"
ref="article_id=30191305&amp;linksrc=citedby_articles_link&amp;ordinalpos=2"
data-ga-category="cited_by"
data-ga-action="30191305"
data-ga-label="">
Macular degeneration and occupational risk factors: a systematic review.
</a>
<div class="docsum-citation full-citation">
<span class="docsum-authors full-authors">Modenese A, Gobba F.</span>
<span class="docsum-authors short-authors">Modenese A, et al.</span>
<span class="docsum-journal-citation full-journal-citation">Int Arch Occup Environ Health. 2019 Jan;92(1):1-11. doi: 10.1007/s00420-018-1355-y. Epub 2018 Sep 6.</span>
<span class="docsum-journal-citation short-journal-citation">Int Arch Occup Environ Health. 2019.</span>
<span class="citation-part">PMID: <span class="docsum-pmid">30191305</span></span>
<span class="free-resources spaced-citation-item citation-part">Free PMC article.</span>
</div>
</div>
</li>
<li class="full-docsum">
<div class="docsum-content" style="display:inline;">
<a class="docsum-title"
href="/25253943/"
ref="article_id=25253943&amp;linksrc=citedby_articles_link&amp;ordinalpos=3"
data-ga-category="cited_by"
data-ga-action="25253943"
data-ga-label="">
Occupational exposures and colorectal cancers: a quantitative overview of epidemiological evidence.
</a>
<div class="docsum-citation full-citation">
<span class="docsum-authors full-authors">Oddone E, Modonesi C, Gatta G.</span>
<span class="docsum-authors short-authors">Oddone E, et al.</span>
<span class="docsum-journal-citation full-journal-citation">World J Gastroenterol. 2014 Sep 21;20(35):12431-44. doi: 10.3748/wjg.v20.i35.12431.</span>
<span class="docsum-journal-citation short-journal-citation">World J Gastroenterol. 2014.</span>
<span class="citation-part">PMID: <span class="docsum-pmid">25253943</span></span>
<span class="free-resources spaced-citation-item citation-part">Free PMC article.</span>
<span class="publication-type spaced-citation-item citation-part">Review.</span>
</div>
</div>
</li>
<li class="full-docsum">
<div class="docsum-content" style="display:inline;">
<a class="docsum-title"
href="/34551792/"
ref="article_id=34551792&amp;linksrc=citedby_articles_link&amp;ordinalpos=4"
data-ga-category="cited_by"
data-ga-action="34551792"
data-ga-label="">
Digitally connected work and its consequences for strain - a systematic review.
</a>
<div class="docsum-citation full-citation">
<span class="docsum-authors full-authors">Zolg S, Heiden B, Herbig B.</span>
<span class="docsum-authors short-authors">Zolg S, et al.</span>
<span class="docsum-journal-citation full-journal-citation">J Occup Med Toxicol. 2021 Sep 22;16(1):42. doi: 10.1186/s12995-021-00333-z.</span>
<span class="docsum-journal-citation short-journal-citation">J Occup Med Toxicol. 2021.</span>
<span class="citation-part">PMID: <span class="docsum-pmid">34551792</span></span>
<span class="free-resources spaced-citation-item citation-part">Free PMC article.</span>
<span class="publication-type spaced-citation-item citation-part">Review.</span>
</div>
</div>
</li>
<li class="full-docsum">
<div class="docsum-content" style="display:inline;">
<a class="docsum-title"
href="/33066111/"
ref="article_id=33066111&amp;linksrc=citedby_articles_link&amp;ordinalpos=5"
data-ga-category="cited_by"
data-ga-action="33066111"
data-ga-label="">
Work-Related Psychosocial Stress in Small and Medium-Sized Enterprises: An Integrative Review.
</a>
<div class="docsum-citation full-citation">
<span class="docsum-authors full-authors">Schreibauer EC, Hippler M, Burgess S, Rieger MA, Rind E.</span>
<span class="docsum-authors short-authors">Schreibauer EC, et al.</span>
<span class="docsum-journal-citation full-journal-citation">Int J Environ Res Public Health. 2020 Oct 13;17(20):7446. doi: 10.3390/ijerph17207446.</span>
<span class="docsum-journal-citation short-journal-citation">Int J Environ Res Public Health. 2020.</span>
<span class="citation-part">PMID: <span class="docsum-pmid">33066111</span></span>
<span class="free-resources spaced-citation-item citation-part">Free PMC article.</span>
<span class="publication-type spaced-citation-item citation-part">Review.</span>
</div>
</div>
</li>
</ul>
<div class="actions-bar">
<a
class="show-all-linked-articles"
data-href="/?linkname=pubmed_pubmed_citedin&from_uid=19819858"
data-ga-category="cited_by"
data-ga-action="show_all"
>
See all "Cited by" articles
</a>
</div>
</div>
<div class="references" id="references">
<h2 class="title">
References
</h2>
<div id='top-references-list' class="references-lists-container">
<div class="refs-list">
<ol id="top-references-list-1" class="references-list">
<li>
<ol class="references-and-notes-list">
<li
class="skip-numbering"
value="1">
Palmer KT, Poole J, Ayres JG, et al. Exposure to metal fume and infectious pneumonia. Am J Epidemiol 2003;157:22733
-
<a
class="reference-link"
href="/12543622/"
ref="linksrc=references_link&amp;ordinalpos=1"
data-ga-category="reference"
data-ga-action="12543622"
>
PubMed
</a>
</li>
</ol>
</li>
<li>
<ol class="references-and-notes-list">
<li
class="skip-numbering"
value="1">
Gehanno JF, Thirion B. How to select publications on occupational health: the usefulness of Medline and the impact factor. Occup Environ Med 2000;57:7069
-
<a
class="reference-link"
href="https://pmc.ncbi.nlm.nih.gov/articles/PMC1739865/"
ref="linksrc=references_link&amp;ordinalpos=1"
data-ga-category="reference"
data-ga-action="PMC1739865"
>
PMC
</a>
-
<a
class="reference-link"
href="/10984344/"
ref="linksrc=references_link&amp;ordinalpos=2"
data-ga-category="reference"
data-ga-action="10984344"
>
PubMed
</a>
</li>
</ol>
</li>
<li>
<ol class="references-and-notes-list">
<li
class="skip-numbering"
value="1">
Verbeek J, Salmi J, Pasternack I, et al. A search strategy for occupational health intervention studies. Occup Environ Med 2005;62:6827
-
<a
class="reference-link"
href="https://pmc.ncbi.nlm.nih.gov/articles/PMC1740874/"
ref="linksrc=references_link&amp;ordinalpos=1"
data-ga-category="reference"
data-ga-action="PMC1740874"
>
PMC
</a>
-
<a
class="reference-link"
href="/16169913/"
ref="linksrc=references_link&amp;ordinalpos=2"
data-ga-category="reference"
data-ga-action="16169913"
>
PubMed
</a>
</li>
</ol>
</li>
<li>
<ol class="references-and-notes-list">
<li
class="skip-numbering"
value="1">
Schaafsma F, Hulshof C, Verbeek J, et al. Developing search strategies in Medline on the occupational origin of diseases. Am J Ind Med 2006;49:12737
-
<a
class="reference-link"
href="/16362948/"
ref="linksrc=references_link&amp;ordinalpos=1"
data-ga-category="reference"
data-ga-action="16362948"
>
PubMed
</a>
</li>
</ol>
</li>
<li>
<ol class="references-and-notes-list">
<li
class="skip-numbering"
value="1">
Lowe HJ, Barnett GO. Understanding and using the medical subject headings (MeSH) vocabulary to perform literature searches. JAMA 1994;271:11038
-
<a
class="reference-link"
href="/8151853/"
ref="linksrc=references_link&amp;ordinalpos=1"
data-ga-category="reference"
data-ga-action="8151853"
>
PubMed
</a>
</li>
</ol>
</li>
</ol>
<div class="actions-bar">
<button
class="show-all"
ref="linksrc=show_all_references_link"
aria-controls="top-references-list-1"
data-next-page-url="/19819858/references/"
data-ga-category="reference"
data-ga-action="show_more"
>
Show all 15 references
</button>
</div>
</div>
</div>
</div>
<div id="publication-types" class="publication-types keywords-section">
<h2 class="title">
Publication types
</h2>
<ul class="keywords-list"><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link"
aria-label="Toggle dropdown menu for keyword Research Support, Non-U.S. Gov&#x27;t"
tabindex="0"
aria-controls="keyword-actions-publication-types-0"
aria-expanded="false"
data-pinger-ignore>
Research Support, Non-U.S. Gov&#x27;t
</button><div id="keyword-actions-publication-types-0"
class="keyword-actions-dropdown dropdown dropdown-container"
hidden
aria-label="Dropdown menu for keyword Research Support, Non-U.S. Gov&#x27;t"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link"
href="/?term=%22Research+Support%2C+Non-U.S.+Gov%27t%22%5Bpt%5D&amp;sort=date&amp;sort_order=desc"
data-href="/?term=%22Research+Support%2C+Non-U.S.+Gov%27t%22%5Bpt%5D&amp;sort=date&amp;sort_order=desc"
ref="linksrc=search_in_pubmed_keyword_link&amp;keyword=&quot;Research Support, Non-U.S. Gov&#x27;t&quot;[pt]"
data-ga-category="search"
data-ga-action="pub_type"
data-ga-label="Research Support, Non-U.S. Gov&#x27;t">
Search in PubMed
</a></li><li><a class="search-in-mesh-link dropdown-block-link"
ref="linksrc=search_in_mesh_link"
href="https://www.ncbi.nlm.nih.gov/mesh?term=Research+Support%2C+Non-U.S.+Gov%27t"
data-ga-category="search_mesh"
data-ga-action="pub_type_link"
data-ga-label="Research Support, Non-U.S. Gov&#x27;t">
Search in MeSH
</a></li><li><a class="add-to-search-link dropdown-block-link"
ref="linksrc=add_to_search_link"
role="button"
data-search-term="&quot;Research Support, Non-U.S. Gov&#x27;t&quot;[pt]"
data-ga-category="search"
data-ga-action="add_to_search"
data-ga-label="&quot;Research Support, Non-U.S. Gov&#x27;t&quot;[pt]"
href="#">
Add to Search
</a></li></ul></div></div></div></li></ul>
</div>
<div id="mesh-terms" class="mesh-terms keywords-section">
<h2 class="title">
MeSH terms
</h2>
<ul class="keywords-list"><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link"
aria-label="Toggle dropdown menu for keyword Humans"
tabindex="0"
aria-controls="keyword-actions-mesh-terms-0"
aria-expanded="false"
data-pinger-ignore>
Humans
</button><div id="keyword-actions-mesh-terms-0"
class="keyword-actions-dropdown dropdown dropdown-container"
hidden
aria-label="Dropdown menu for keyword Humans"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link"
href="/?term=%22Humans%22%5BMeSH%5D&amp;sort=date&amp;sort_order=desc"
data-href="/?term=%22Humans%22%5BMeSH%5D&amp;sort=date&amp;sort_order=desc"
ref="linksrc=search_in_pubmed_keyword_link&amp;mesh=&quot;Humans&quot;[MeSH]"
data-ga-category="search"
data-ga-action="mesh_term"
data-ga-label="Humans">
Search in PubMed
</a></li><li><a class="search-in-mesh-link dropdown-block-link"
ref="linksrc=search_in_mesh_link"
href="https://www.ncbi.nlm.nih.gov/mesh?term=Humans"
data-ga-category="search_mesh"
data-ga-action="mesh_term_link"
data-ga-label="Humans">
Search in MeSH
</a></li><li><a class="add-to-search-link dropdown-block-link"
ref="linksrc=add_to_search_link"
role="button"
data-search-term="&quot;Humans&quot;[MeSH]"
data-ga-category="search"
data-ga-action="add_to_search"
data-ga-label="&quot;Humans&quot;[MeSH]"
href="#">
Add to Search
</a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link"
aria-label="Toggle dropdown menu for keyword Information Storage and Retrieval / methods"
tabindex="0"
aria-controls="keyword-actions-mesh-terms-1"
aria-expanded="false"
data-pinger-ignore>
Information Storage and Retrieval / methods
</button><div id="keyword-actions-mesh-terms-1"
class="keyword-actions-dropdown dropdown dropdown-container"
hidden
aria-label="Dropdown menu for keyword Information Storage and Retrieval / methods"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link"
href="/?term=%22Information+Storage+and+Retrieval%2Fmethods%22%5BMeSH%5D&amp;sort=date&amp;sort_order=desc"
data-href="/?term=%22Information+Storage+and+Retrieval%2Fmethods%22%5BMeSH%5D&amp;sort=date&amp;sort_order=desc"
ref="linksrc=search_in_pubmed_keyword_link&amp;mesh=&quot;Information Storage and Retrieval/methods&quot;[MeSH]"
data-ga-category="search"
data-ga-action="mesh_term"
data-ga-label="Information Storage and Retrieval / methods">
Search in PubMed
</a></li><li><a class="search-in-mesh-link dropdown-block-link"
ref="linksrc=search_in_mesh_link"
href="https://www.ncbi.nlm.nih.gov/mesh?term=Information+Storage+and+Retrieval"
data-ga-category="search_mesh"
data-ga-action="mesh_term_link"
data-ga-label="Information Storage and Retrieval / methods">
Search in MeSH
</a></li><li><a class="add-to-search-link dropdown-block-link"
ref="linksrc=add_to_search_link"
role="button"
data-search-term="&quot;Information Storage and Retrieval/methods&quot;[MeSH]"
data-ga-category="search"
data-ga-action="add_to_search"
data-ga-label="&quot;Information Storage and Retrieval/methods&quot;[MeSH]"
href="#">
Add to Search
</a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link major"
aria-label="Toggle dropdown menu for keyword Occupational Diseases / etiology*"
tabindex="0"
aria-controls="keyword-actions-mesh-terms-major-2"
aria-expanded="false"
data-pinger-ignore>
Occupational Diseases / etiology*
</button><div id="keyword-actions-mesh-terms-major-2"
class="keyword-actions-dropdown dropdown dropdown-container"
hidden
aria-label="Dropdown menu for keyword Occupational Diseases / etiology*"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link"
href="/?term=%22Occupational+Diseases%2Fetiology%22%5BMAJR%5D&amp;sort=date&amp;sort_order=desc"
data-href="/?term=%22Occupational+Diseases%2Fetiology%22%5BMAJR%5D&amp;sort=date&amp;sort_order=desc"
ref="linksrc=search_in_pubmed_keyword_link&amp;mesh=&quot;Occupational Diseases/etiology&quot;[MAJR]"
data-ga-category="search"
data-ga-action="mesh_term"
data-ga-label="Occupational Diseases / etiology*">
Search in PubMed
</a></li><li><a class="search-in-mesh-link dropdown-block-link"
ref="linksrc=search_in_mesh_link"
href="https://www.ncbi.nlm.nih.gov/mesh?term=Occupational+Diseases"
data-ga-category="search_mesh"
data-ga-action="mesh_term_link"
data-ga-label="Occupational Diseases / etiology*">
Search in MeSH
</a></li><li><a class="add-to-search-link dropdown-block-link"
ref="linksrc=add_to_search_link"
role="button"
data-search-term="&quot;Occupational Diseases/etiology&quot;[MAJR]"
data-ga-category="search"
data-ga-action="add_to_search"
data-ga-label="&quot;Occupational Diseases/etiology&quot;[MAJR]"
href="#">
Add to Search
</a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link major"
aria-label="Toggle dropdown menu for keyword Occupational Exposure*"
tabindex="0"
aria-controls="keyword-actions-mesh-terms-major-3"
aria-expanded="false"
data-pinger-ignore>
Occupational Exposure*
</button><div id="keyword-actions-mesh-terms-major-3"
class="keyword-actions-dropdown dropdown dropdown-container"
hidden
aria-label="Dropdown menu for keyword Occupational Exposure*"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link"
href="/?term=%22Occupational+Exposure%22%5BMAJR%5D&amp;sort=date&amp;sort_order=desc"
data-href="/?term=%22Occupational+Exposure%22%5BMAJR%5D&amp;sort=date&amp;sort_order=desc"
ref="linksrc=search_in_pubmed_keyword_link&amp;mesh=&quot;Occupational Exposure&quot;[MAJR]"
data-ga-category="search"
data-ga-action="mesh_term"
data-ga-label="Occupational Exposure*">
Search in PubMed
</a></li><li><a class="search-in-mesh-link dropdown-block-link"
ref="linksrc=search_in_mesh_link"
href="https://www.ncbi.nlm.nih.gov/mesh?term=Occupational+Exposure"
data-ga-category="search_mesh"
data-ga-action="mesh_term_link"
data-ga-label="Occupational Exposure*">
Search in MeSH
</a></li><li><a class="add-to-search-link dropdown-block-link"
ref="linksrc=add_to_search_link"
role="button"
data-search-term="&quot;Occupational Exposure&quot;[MAJR]"
data-ga-category="search"
data-ga-action="add_to_search"
data-ga-label="&quot;Occupational Exposure&quot;[MAJR]"
href="#">
Add to Search
</a></li></ul></div></div></div></li><li><div class="keyword-actions dropdown-block"><button class="keyword-actions-trigger trigger keyword-link major"
aria-label="Toggle dropdown menu for keyword PubMed*"
tabindex="0"
aria-controls="keyword-actions-mesh-terms-major-4"
aria-expanded="false"
data-pinger-ignore>
PubMed*
</button><div id="keyword-actions-mesh-terms-major-4"
class="keyword-actions-dropdown dropdown dropdown-container"
hidden
aria-label="Dropdown menu for keyword PubMed*"><div class="title">Actions</div><div class="content"><ul class="keyword-actions-links"><li><a class="search-in-pubmed-link dropdown-block-link"
href="/?term=%22PubMed%22%5BMAJR%5D&amp;sort=date&amp;sort_order=desc"
data-href="/?term=%22PubMed%22%5BMAJR%5D&amp;sort=date&amp;sort_order=desc"
ref="linksrc=search_in_pubmed_keyword_link&amp;mesh=&quot;PubMed&quot;[MAJR]"
data-ga-category="search"
data-ga-action="mesh_term"
data-ga-label="PubMed*">
Search in PubMed
</a></li><li><a class="search-in-mesh-link dropdown-block-link"
ref="linksrc=search_in_mesh_link"
href="https://www.ncbi.nlm.nih.gov/mesh?term=PubMed"
data-ga-category="search_mesh"
data-ga-action="mesh_term_link"
data-ga-label="PubMed*">
Search in MeSH
</a></li><li><a class="add-to-search-link dropdown-block-link"
ref="linksrc=add_to_search_link"
role="button"
data-search-term="&quot;PubMed&quot;[MAJR]"
data-ga-category="search"
data-ga-action="add_to_search"
data-ga-label="&quot;PubMed&quot;[MAJR]"
href="#">
Add to Search
</a></li></ul></div></div></div></li></ul>
</div>
<div id="related-links" class="related-links">
<h2 class="title">
Related information
</h2>
<ul class="related-links-list"><li><a title="Related information in MedGen" href="https://www.ncbi.nlm.nih.gov/medgen?linkname=pubmed_medgen&amp;from_uid=19819858"
ref="log$=recordlinks&logdbfrom=pubmed&ncbi_uid=19819858&ordinalpos=1&linkpos=1">
MedGen
</a></li><li><a title="Related PubChem Compound" href="https://www.ncbi.nlm.nih.gov/pccompound?linkname=pubmed_pccompound&amp;from_uid=19819858"
ref="log$=recordlinks&logdbfrom=pubmed&ncbi_uid=19819858&ordinalpos=1&linkpos=2">
PubChem Compound
</a></li><li><a title="Related PubChem Substance" href="https://www.ncbi.nlm.nih.gov/pcsubstance?linkname=pubmed_pcsubstance&amp;from_uid=19819858"
ref="log$=recordlinks&logdbfrom=pubmed&ncbi_uid=19819858&ordinalpos=1&linkpos=3">
PubChem Substance
</a></li></ul>
</div>
<div id="linkout" class="linkout">
<h2 class="title">
LinkOut - more resources
</h2>
<ul class="linkout-list"><li><h3 class="linkout-category">Full Text Sources</h3><ul class="linkout-category-links"><li><a
href="https://europepmc.org/abstract/MED/19819858"
target="_blank"
rel="noopener"
ref="linksrc=linkout_link&PrId=6082&uid=19819858&db=pubmed&itool=Abstract&log$=linkoutlink&nlmid=9422759"
data-ga-category="link_out"
data-ga-action="Full Text Sources"
data-ga-label="Europe PubMed Central"
>
Europe PubMed Central
</a></li><li><a
href="http://oem.bmj.com/lookup/pmidlookup?view=long&amp;pmid=19819858"
target="_blank"
rel="noopener"
ref="linksrc=linkout_link&PrId=3051&uid=19819858&db=pubmed&itool=Abstract&log$=linkoutlink&nlmid=9422759"
data-ga-category="link_out"
data-ga-action="Full Text Sources"
data-ga-label="HighWire"
>
HighWire
</a></li><li><a
href="http://ovidsp.ovid.com/ovidweb.cgi?T=JS&amp;PAGE=linkout&amp;SEARCH=19819858.ui"
target="_blank"
rel="noopener"
ref="linksrc=linkout_link&PrId=3682&uid=19819858&db=pubmed&itool=Abstract&log$=linkoutlink&nlmid=9422759"
data-ga-category="link_out"
data-ga-action="Full Text Sources"
data-ga-label="Ovid Technologies, Inc."
>
Ovid Technologies, Inc.
</a></li><li><a
href="https://pmc.ncbi.nlm.nih.gov/articles/pmid/19819858/"
target="_blank"
rel="noopener"
ref="linksrc=linkout_link&PrId=3494&uid=19819858&db=pubmed&itool=Abstract&log$=linkoutlink&nlmid=9422759"
data-ga-category="link_out"
data-ga-action="Full Text Sources"
data-ga-label="PubMed Central"
>
PubMed Central
</a></li></ul></li><li><h3 class="linkout-category">Medical</h3><ul class="linkout-category-links"><li><a
href="https://medlineplus.gov/occupationalhealth.html"
target="_blank"
rel="noopener"
ref="linksrc=linkout_link&PrId=3162&uid=19819858&db=pubmed&itool=Abstract&log$=linkoutlink&nlmid=9422759"
data-ga-category="link_out"
data-ga-action="Medical"
data-ga-label="MedlinePlus Health Information"
>
MedlinePlus Health Information
</a></li></ul></li></ul>
</div>
</main>
<div class="overlay" role="dialog" aria-label="Full Text Links Dialog">
<div id="full-text-links-dialog" class="dialog full-text-links-dialog">
<strong class="title">Full text links</strong>
<button class="close-overlay" tabindex="3">[x]</button>
<div class="full-text-links-list">
<a class="link-item
dialog-focus"
href="http://oem.bmj.com/lookup/pmidlookup?view=long&amp;pmid=19819858"
target="_blank"
rel="noopener"
ref="linksrc=fulltextorjournal_fulltext&amp;is_pmc=False&amp;PrId=3051&amp;itool=Abstract-def&amp;log$=linkouticon&amp;uid=19819858&amp;db=pubmed&amp;nlmid=9422759"
title="See full text options at HighWire"
tabindex="1"
data-ga-category="full_text"
data-ga-action="HighWire"
data-ga-label="19819858"
><img src="https://cdn.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--highwire.stanford.edu-icons-externalservices-pubmed-custom-bmjjournals_open_access.gif" alt="HighWire full text link"><span class="text">
HighWire
</span></a><a class="link-item
pmc
"
href="https://pmc.ncbi.nlm.nih.gov/articles/pmid/19819858/"
target="_blank"
rel="noopener"
ref="linksrc=fulltextorjournal_fulltext&amp;is_pmc=True&amp;PrId=3494&amp;itool=Abstract-def&amp;log$=linkouticon&amp;uid=19819858&amp;db=pubmed&amp;nlmid=9422759"
title="Free full text at PubMed Central"
tabindex="2"
data-ga-category="full_text"
data-ga-action="PMC"
data-ga-label="19819858"
><span class="text">
Free PMC article
</span></a>
</div>
</div>
</div>
<div class="overlay" role="dialog" aria-label="Citation Dialog">
<div class="dialog citation-dialog">
<button class="close-overlay" tabindex="1">[x]</button>
<div class="title">Cite</div>
<div class="citation-text-block">
<div class="citation-text"></div>
<div class="citation-actions">
<button
class="copy-button dialog-focus"
data-ga-category="save_share"
data-ga-action="cite"
data-ga-label="copy"
tabindex="2">
Copy
</button>
<form method="post">
<input type="hidden" name="csrfmiddlewaretoken" value="Nl98KuHr7NOvDrCaNAucnKDp1vuqMgNT48TdnkaNHoBZxSI0qT7eRS93zzcCFRld">
<button type="submit"
class="export-button"
data-ga-category="save_share"
data-ga-action="cite"
data-ga-label="download"
title="Download a file for external citation management software"
tabindex="3">
<span class="download-title">Download .nbib</span>
<span class="download-title-mobile">.nbib</span>
</button>
</form>
<div class="citation-style-selector-wrapper">
<label class="selector-label">Format:</label>
<select aria-label="Format" class="citation-style-selector" tabindex="4">
<option data-style-url-name="ama"
value="AMA"
>
AMA
</option>
<option data-style-url-name="apa"
value="APA"
>
APA
</option>
<option data-style-url-name="mla"
value="MLA"
>
MLA
</option>
<option data-style-url-name="nlm"
value="NLM"
selected="selected">
NLM
</option>
</select>
</div>
</div>
</div>
</div>
</div>
<div class="overlay" role="dialog" aria-label="More Actions Dialog">
<div id="more-actions-dialog" class="dialog more-actions-dialog">
<strong class="title">Send To</strong>
<ul class="more-actions-links">
<li><a id="clipboard-trigger" role="button" class="submit-button clipboard-trigger clipboard-trigger-target dialog-focus link-item " href="#">Clipboard</a></li>
<li><a class="email-trigger link-item" role="button" href="#">Email</a></li>
<li><a class="save-trigger link-item" role="button" href="#">Save</a></li>
<li><a class="link-item" role="button" href="https://account.ncbi.nlm.nih.gov/?back_url=https%3A%2F%2Fpubmed.ncbi.nlm.nih.gov%2F19819858%2F%23open-bibliography-panel">My Bibliography</a></li>
<li><a class="link-item" role="button" href="https://account.ncbi.nlm.nih.gov/?back_url=https%3A%2F%2Fpubmed.ncbi.nlm.nih.gov%2F19819858%2F%23open-collections-panel">Collections</a></li>
<li><a class="citation-manager-trigger link-item" role="button" href="#">Citation Manager</a></li>
</ul>
<button class="close-overlay">[x]</button>
</div>
</div>
</div>
<div id="ncbi-footer">
<div class="literature-footer" role="complementary" title="Links to NCBI Literature Resources">
<div class="usa-grid">
<p class="literature-footer-text">NCBI Literature Resources</p>
<p class="literature-footer-text">
<a class="literature-footer-link" data-ga-category="literature_resources" data-ga-action="mesh_link" href="https://www.ncbi.nlm.nih.gov/mesh/">MeSH</a>
<a class="literature-footer-link" data-ga-category="literature_resources" data-ga-action="pmc_link" href="https://www.ncbi.nlm.nih.gov/pmc/">PMC</a>
<a class="literature-footer-link" data-ga-category="literature_resources" data-ga-action="bookshelf_link" href="https://www.ncbi.nlm.nih.gov/books">Bookshelf</a>
<a class="literature-footer-link" data-ga-category="literature_resources" data-ga-action="disclaimer_link" href="/disclaimer/">Disclaimer</a>
</p>
<p class="literature-footer-text attribution-statement">The PubMed wordmark and PubMed logo are registered trademarks of the U.S. Department of Health and Human Services (HHS). Unauthorized use of these marks is strictly prohibited.</p>
</div>
</div>
<!-- ========== BEGIN FOOTER ========== -->
<footer>
<section class="icon-section">
<div id="icon-section-header" class="icon-section_header">Follow NCBI</div>
<div class="grid-container container">
<div class="icon-section_container">
<a class="footer-icon" id="footer_twitter" href="https://twitter.com/ncbi" aria-label="Twitter">
<svg width="40" height="40" viewBox="0 0 40 37" fill="none" xmlns="http://www.w3.org/2000/svg">
<title>Twitter</title>
<g id="twitterx1008">
<path id="path1008"
d="M6.06736 7L16.8778 20.8991L6.00001 32.2H10.2L18.6 23.1L25.668 32.2H34L22.8 17.5L31.9 7H28.4L20.7 15.4L14.401 7H6.06898H6.06736ZM9.66753 8.73423H12.9327L29.7327 30.4658H26.5697L9.66753 8.73423Z"
fill="#5B616B"/>
</g>
</svg>
</a>
<a class="footer-icon" id="footer_facebook" href="https://www.facebook.com/ncbi.nlm" aria-label="Facebook"><svg
data-name="Layer 1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 300 300">
<title>Facebook</title>
<path class="cls-11"
d="M210.5,115.12H171.74V97.82c0-8.14,5.39-10,9.19-10h27.14V52l-39.32-.12c-35.66,0-42.42,26.68-42.42,43.77v19.48H99.09v36.32h27.24v109h45.41v-109h35Z">
</path>
</svg></a>
<a class="footer-icon" id="footer_linkedin"
href="https://www.linkedin.com/company/ncbinlm"
aria-label="LinkedIn"><svg data-name="Layer 1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 300 300">
<title>LinkedIn</title>
<path class="cls-11"
d="M101.64,243.37H57.79v-114h43.85Zm-22-131.54h-.26c-13.25,0-21.82-10.36-21.82-21.76,0-11.65,8.84-21.15,22.33-21.15S101.7,78.72,102,90.38C102,101.77,93.4,111.83,79.63,111.83Zm100.93,52.61A17.54,17.54,0,0,0,163,182v61.39H119.18s.51-105.23,0-114H163v13a54.33,54.33,0,0,1,34.54-12.66c26,0,44.39,18.8,44.39,55.29v58.35H198.1V182A17.54,17.54,0,0,0,180.56,164.44Z">
</path>
</svg></a>
<a class="footer-icon" id="footer_github" href="https://github.com/ncbi" aria-label="GitHub"><svg
data-name="Layer 1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 300 300">
<defs>
<style>
.cls-11,
.cls-12 {
fill: #737373;
}
.cls-11 {
fill-rule: evenodd;
}
</style>
</defs>
<title>GitHub</title>
<path class="cls-11"
d="M151.36,47.28a105.76,105.76,0,0,0-33.43,206.1c5.28,1,7.22-2.3,7.22-5.09,0-2.52-.09-10.85-.14-19.69-29.42,6.4-35.63-12.48-35.63-12.48-4.81-12.22-11.74-15.47-11.74-15.47-9.59-6.56.73-6.43.73-6.43,10.61.75,16.21,10.9,16.21,10.9,9.43,16.17,24.73,11.49,30.77,8.79,1-6.83,3.69-11.5,6.71-14.14C108.57,197.1,83.88,188,83.88,147.51a40.92,40.92,0,0,1,10.9-28.39c-1.1-2.66-4.72-13.42,1-28,0,0,8.88-2.84,29.09,10.84a100.26,100.26,0,0,1,53,0C198,88.3,206.9,91.14,206.9,91.14c5.76,14.56,2.14,25.32,1,28a40.87,40.87,0,0,1,10.89,28.39c0,40.62-24.74,49.56-48.29,52.18,3.79,3.28,7.17,9.71,7.17,19.58,0,14.15-.12,25.54-.12,29,0,2.82,1.9,6.11,7.26,5.07A105.76,105.76,0,0,0,151.36,47.28Z">
</path>
<path class="cls-12"
d="M85.66,199.12c-.23.52-1.06.68-1.81.32s-1.2-1.06-.95-1.59,1.06-.69,1.82-.33,1.21,1.07.94,1.6Zm-1.3-1">
</path>
<path class="cls-12"
d="M90,203.89c-.51.47-1.49.25-2.16-.49a1.61,1.61,0,0,1-.31-2.19c.52-.47,1.47-.25,2.17.49s.82,1.72.3,2.19Zm-1-1.08">
</path>
<path class="cls-12"
d="M94.12,210c-.65.46-1.71,0-2.37-.91s-.64-2.07,0-2.52,1.7,0,2.36.89.65,2.08,0,2.54Zm0,0"></path>
<path class="cls-12"
d="M99.83,215.87c-.58.64-1.82.47-2.72-.41s-1.18-2.06-.6-2.7,1.83-.46,2.74.41,1.2,2.07.58,2.7Zm0,0">
</path>
<path class="cls-12"
d="M107.71,219.29c-.26.82-1.45,1.2-2.64.85s-2-1.34-1.74-2.17,1.44-1.23,2.65-.85,2,1.32,1.73,2.17Zm0,0">
</path>
<path class="cls-12"
d="M116.36,219.92c0,.87-1,1.59-2.24,1.61s-2.29-.68-2.3-1.54,1-1.59,2.26-1.61,2.28.67,2.28,1.54Zm0,0">
</path>
<path class="cls-12"
d="M124.42,218.55c.15.85-.73,1.72-2,1.95s-2.37-.3-2.52-1.14.73-1.75,2-2,2.37.29,2.53,1.16Zm0,0"></path>
</svg></a>
<a class="footer-icon" id="footer_blog" href="https://ncbiinsights.ncbi.nlm.nih.gov/" aria-label="Blog">
<svg id="Layer_1" data-name="Layer 1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 40 40"><defs><style>.cls-1{fill:#737373;}</style></defs><path class="cls-1" d="M14,30a4,4,0,1,1-4-4,4,4,0,0,1,4,4Zm11,3A19,19,0,0,0,7.05,15a1,1,0,0,0-1,1v3a1,1,0,0,0,.93,1A14,14,0,0,1,20,33.07,1,1,0,0,0,21,34h3a1,1,0,0,0,1-1Zm9,0A28,28,0,0,0,7,6,1,1,0,0,0,6,7v3a1,1,0,0,0,1,1A23,23,0,0,1,29,33a1,1,0,0,0,1,1h3A1,1,0,0,0,34,33Z"/></svg>
</a>
</div>
</div>
</section>
<section class="container-fluid bg-primary">
<div class="container pt-5">
<div class="row mt-3">
<div class="col-lg-3 col-12">
<p><a class="text-white" href="https://www.nlm.nih.gov/socialmedia/index.html">Connect with NLM</a></p>
<ul class="list-inline social_media">
<li class="list-inline-item"><a href="https://twitter.com/NLM_NIH" aria-label="Twitter"
target="_blank" rel="noopener noreferrer">
<svg width="35" height="35" viewBox="0 0 38 35" fill="none" xmlns="http://www.w3.org/2000/svg">
<title>Twitter</title>
<g id="twitterx1009" clip-path="url(#clip0_65276_3946)">
<path id="Vector" d="M17.5006 34.6565C26.9761 34.6565 34.6575 26.9751 34.6575 17.4996C34.6575 8.02416 26.9761 0.342773 17.5006 0.342773C8.02514 0.342773 0.34375 8.02416 0.34375 17.4996C0.34375 26.9751 8.02514 34.6565 17.5006 34.6565Z" fill="#205493" stroke="white" stroke-width="1.2" stroke-miterlimit="10"></path>
<path id="path1009" d="M8.54811 8.5L16.2698 18.4279L8.50001 26.5H11.5L17.5 20L22.5486 26.5H28.5L20.5 16L27 8.5H24.5L19 14.5L14.5007 8.5H8.54927H8.54811ZM11.1197 9.73873H13.4519L25.4519 25.2613H23.1926L11.1197 9.73873Z" fill="white"></path>
</g>
<defs>
<clipPath id="clip0_65276_3946">
<rect width="38" height="38" fill="white"></rect>
</clipPath>
</defs>
</svg></a>
</li>
<li class="list-inline-item"><a href="https://www.facebook.com/nationallibraryofmedicine"
aria-label="Facebook" rel="noopener noreferrer" target="_blank">
<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px"
y="0px" viewBox="0 0 249 249" style="enable-background:new 0 0 249 249;" xml:space="preserve">
<style type="text/css">
.st10 {
fill: #FFFFFF;
}
.st110 {
fill: none;
stroke: #FFFFFF;
stroke-width: 8;
stroke-miterlimit: 10;
}
</style>
<title>SM-Facebook</title>
<g>
<g>
<path class="st10" d="M159,99.1h-24V88.4c0-5,3.3-6.2,5.7-6.2h16.8V60l-24.4-0.1c-22.1,0-26.2,16.5-26.2,27.1v12.1H90v22.5h16.9
v67.5H135v-67.5h21.7L159,99.1z"></path>
</g>
</g>
<circle class="st110" cx="123.6" cy="123.2" r="108.2"></circle>
</svg>
</a></li>
<li class="list-inline-item"><a href="https://www.youtube.com/user/NLMNIH" aria-label="Youtube"
target="_blank" rel="noopener noreferrer"><svg version="1.1" xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 249 249"
style="enable-background:new 0 0 249 249;" xml:space="preserve">
<title>SM-Youtube</title>
<style type="text/css">
.st4 {
fill: none;
stroke: #FFFFFF;
stroke-width: 8;
stroke-miterlimit: 10;
}
.st5 {
fill: #FFFFFF;
}
</style>
<circle class="st4" cx="124.2" cy="123.4" r="108.2"></circle>
<g transform="translate(0,-952.36218)">
<path class="st5"
d="M88.4,1037.4c-10.4,0-18.7,8.3-18.7,18.7v40.1c0,10.4,8.3,18.7,18.7,18.7h72.1c10.4,0,18.7-8.3,18.7-18.7
v-40.1c0-10.4-8.3-18.7-18.7-18.7H88.4z M115.2,1058.8l29.4,17.4l-29.4,17.4V1058.8z"></path>
</g>
</svg></a></li>
</ul>
</div>
<div class="col-lg-3 col-12">
<p class="address_footer text-white">National Library of Medicine<br>
<a href="https://www.google.com/maps/place/8600+Rockville+Pike,+Bethesda,+MD+20894/@38.9959508,-77.101021,17z/data=!3m1!4b1!4m5!3m4!1s0x89b7c95e25765ddb:0x19156f88b27635b8!8m2!3d38.9959508!4d-77.0988323"
class="text-white" target="_blank" rel="noopener noreferrer">8600 Rockville Pike<br>
Bethesda, MD 20894</a></p>
</div>
<div class="col-lg-3 col-12 centered-lg">
<p><a href="https://www.nlm.nih.gov/web_policies.html" class="text-white">Web Policies</a><br>
<a href="https://www.nih.gov/institutes-nih/nih-office-director/office-communications-public-liaison/freedom-information-act-office"
class="text-white">FOIA</a><br>
<a href="https://www.hhs.gov/vulnerability-disclosure-policy/index.html" class="text-white" id="vdp">HHS Vulnerability Disclosure</a></p>
</div>
<div class="col-lg-3 col-12 centered-lg">
<p><a class="supportLink text-white" href="https://support.nlm.nih.gov/">Help</a><br>
<a href="https://www.nlm.nih.gov/accessibility.html" class="text-white">Accessibility</a><br>
<a href="https://www.nlm.nih.gov/careers/careers.html" class="text-white">Careers</a></p>
</div>
</div>
<div class="row">
<div class="col-lg-12 centered-lg">
<nav class="bottom-links">
<ul class="mt-3">
<li>
<a class="text-white" href="//www.nlm.nih.gov/">NLM</a>
</li>
<li>
<a class="text-white"
href="https://www.nih.gov/">NIH</a>
</li>
<li>
<a class="text-white" href="https://www.hhs.gov/">HHS</a>
</li>
<li>
<a
class="text-white" href="https://www.usa.gov/">USA.gov</a>
</li>
</ul>
</nav>
</div>
</div>
</div>
</section>
</footer>
<!-- ========== END FOOTER ========== -->
<!-- javascript to inject NWDS meta tags. Note: value of nwds_version is updated by "npm version" command -->
<script type="text/javascript">
var nwds_version = "1.2.3";
var meta_nwds_ver = document.createElement('meta');
meta_nwds_ver.name = 'ncbi_nwds_ver';
meta_nwds_ver.content = nwds_version;
document.getElementsByTagName('head')[0].appendChild(meta_nwds_ver);
var meta_nwds = document.createElement('meta');
meta_nwds.name = 'ncbi_nwds';
meta_nwds.content = 'yes';
document.getElementsByTagName('head')[0].appendChild(meta_nwds);
var alertsUrl = "/core/alerts/alerts.js";
if (typeof ncbiBaseUrl !== 'undefined') {
alertsUrl = ncbiBaseUrl + alertsUrl;
}
</script>
</div>
<!-- jQuery with plugins -->
<script src="https://cdn.ncbi.nlm.nih.gov/pubmed/277eb475-38df-4990-a0ee-0080b04e86fc/CACHE/js/output.293fbf76aa18.js"></script>
<!-- Project base scripts -->
<script src="https://cdn.ncbi.nlm.nih.gov/pubmed/277eb475-38df-4990-a0ee-0080b04e86fc/CACHE/js/output.550e9c8906a2.js"></script>
<script>
ncbi.awesome.basePage.init({
userInfo: {
isLoggedIn: false,
username: "",
loginUrl: "https://account.ncbi.nlm.nih.gov/?back_url=https%3A%2F%2Fpubmed.ncbi.nlm.nih.gov%2F19819858%2F",
logoutUrl: "https://www.ncbi.nlm.nih.gov/account/signout/?back_url=https%3A//pubmed.ncbi.nlm.nih.gov/19819858/"
},
baseUrl: 'https://www.ncbi.nlm.nih.gov',
noSessionCookieName: "pm-ns",
searchIdCookieName: "pm-sid",
adjNavSearchIdCookieName: "pm-adjnav-sid",
searchFormSubmittedCookieName: "pm-sfs",
isOnSearchPageCookieName: "pm-iosp",
backToSearchCookieName: "pm-btsl",
clinicalSeeAllCookieName: "pm-csa",
jsCookieDomain: "pubmed.ncbi.nlm.nih.gov",
userShareRequestFailed: "",
noSharedSettings: "myncbi_no_shared_settings",
noSharedAccount: "myncbi_no_shared_account"
});
</script>
<script type="module">
import dismissableNCBIAlert from "https://cdn.ncbi.nlm.nih.gov/pubmed/277eb475-38df-4990-a0ee-0080b04e86fc/core/dismissable-ncbi-alert.js";
jQuery.getScript("https://www.ncbi.nlm.nih.gov/core/alerts/alerts.js", function () {
galert(['body > *:last-child']);
dismissableNCBIAlert();
}).fail(function() {
});
</script>
<script defer type="text/javascript" src="https://cdn.ncbi.nlm.nih.gov/core/pinger/pinger.js"> </script>
<script src="https://cdn.ncbi.nlm.nih.gov/pubmed/277eb475-38df-4990-a0ee-0080b04e86fc/CACHE/js/output.e3950ac8c6da.js"></script>
<script>
ncbi.awesome.articlePage.init({
baseSuggestionsUrl: "/suggestions/",
mathJaxUrl: "https://cdn.ncbi.nlm.nih.gov/pubmed/277eb475-38df-4990-a0ee-0080b04e86fc/mathjax/unpacked/MathJax.js?config=MML_CHTML",
clipboardAPIRoot: "/ajax/clipboard/",
clipboardNextPageUrl: "/clipboard-next-page/",
searchIdCookieName: "pm-sid",
searchFormSubmittedCookieName: "pm-sfs",
backToSearchCookieName: "pm-btsl",
jsCookieDomain: "pubmed.ncbi.nlm.nih.gov",
longTermPrefix: "longquery",
adjNavURLPath: "/19819858/adj-nav/",
adjNavSearchIdCookieName: "pm-adjnav-sid",
articlePageUrl: "/19819858/",
markJSUrl: "https://cdn.ncbi.nlm.nih.gov/pubmed/277eb475-38df-4990-a0ee-0080b04e86fc/mark.js/dist/jquery.mark.js",
termHighlightColor: "",
highlightedTokens: "",
citeFormatPreferenceCookieName: "pm-cf"
});
</script>
</body>
</html>