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<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="DuvOeIs1o7E9vUQCNJyIguXK0OjGeD9AUhfTRyVnYIrDplWsq2bKKCtoyS1S7eHU">
<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="DuvOeIs1o7E9vUQCNJyIguXK0OjGeD9AUhfTRyVnYIrDplWsq2bKKCtoyS1S7eHU">
<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="DuvOeIs1o7E9vUQCNJyIguXK0OjGeD9AUhfTRyVnYIrDplWsq2bKKCtoyS1S7eHU">
<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="DuvOeIs1o7E9vUQCNJyIguXK0OjGeD9AUhfTRyVnYIrDplWsq2bKKCtoyS1S7eHU">
<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="DuvOeIs1o7E9vUQCNJyIguXK0OjGeD9AUhfTRyVnYIrDplWsq2bKKCtoyS1S7eHU">
<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="31168818">
<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="https://academic.oup.com/bjd/article-lookup/doi/10.1111/bjd.18211"
target="_blank"
rel="noopener"
ref="linksrc=fulltextorjournal_fulltext&amp;is_pmc=False&amp;PrId=7898&amp;itool=Abstract-def&amp;log$=linkouticon&amp;uid=31168818&amp;db=pubmed&amp;nlmid=0004041"
title="See full text options at Silverchair Information Systems"
data-ga-category="full_text"
data-ga-action="Silverchair Information Systems"
data-ga-label="31168818"
><img src="https://cdn.ncbi.nlm.nih.gov/corehtml/query/egifs/https:--academic.oup.com-images-oup_pubmed.png" alt="Silverchair Information Systems full text link"><span class="text">
Silverchair Information Systems
</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="/31168818/citations/"
data-citation-style="nlm"
data-pubmed-format-link="/31168818/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="31168818" 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%2F31168818%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="DuvOeIs1o7E9vUQCNJyIguXK0OjGeD9AUhfTRyVnYIrDplWsq2bKKCtoyS1S7eHU"><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..."
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<h1 class="heading-title">
Genotype-phenotype correlation in a large English cohort of patients with autosomal recessive ichthyosis
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><sup class="key">8</sup> School of Population Health and Environmental Sciences, Faculty of Life Sciences and Medicine, King&#x27;s College London, U.K.</li>
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><sup class="key">10</sup> Department of Dermatology, Birmingham Women&#x27;s and Children&#x27;s NHS Foundation Trust, Birmingham, U.K.</li>
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><sup class="key">13</sup> Department of Dermatology, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle, U.K.</li>
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><sup class="key">14</sup> Manchester Centre for Genomic Medicine, Division of Evolution &amp; Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, U.K.</li>
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><sup class="key">15</sup> Manchester Centre for Genomic Medicine, St Mary&#x27;s Hospital, Manchester University NHS Foundation Trust, Health Innovation Manchester, Manchester, U.K.</li>
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><sup class="key">16</sup> Department of Clinical Genetics, Birmingham Women&#x27;s and Children&#x27;s NHS Foundation Trust, Birmingham, U.K.</li>
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><sup class="key">17</sup> Department of Dermatology, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, U.K.</li>
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><sup class="key">19</sup> Department of Dermatology, Sheffield Children&#x27;s NHS Foundation Trust, Sheffield, U.K.</li>
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><sup class="key">20</sup> Department of Dermatology, South Tees Hospitals NHS Foundation Trust, Middlesbrough, U.K.</li>
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><sup class="key">21</sup> Department of Dermatology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, U.K.</li>
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Genotype-phenotype correlation in a large English cohort of patients with autosomal recessive ichthyosis
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<span class="authors-list-item "><span class="full-name">J K Simpson</span><span class="citation-separator">&nbsp;et al.</span></span>
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data-ga-label="A H SaeIdian">A H SaeIdian</a><sup class="affiliation-links"><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="Department of Dermatology &amp; Cutaneous Biology, Thomas Jefferson University, Philadelphia, PA, U.S.A." href="#short-view-affiliation-4" ref="linksrc=author_aff">
4
</a><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="Genetics, Genomics and Cancer Biology, PhD Program, Thomas Jefferson University, Philadelphia, PA, U.S.A." href="#short-view-affiliation-5" ref="linksrc=author_aff">
5
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
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4
</a><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="Biotechnology Research Center, Department of Molecular Medicine, Pasteur Institute of Iran, Tehran, Iran." href="#short-view-affiliation-7" ref="linksrc=author_aff">
7
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
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8
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
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9
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10
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
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11
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
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12
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
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data-ga-label="S Leech">S Leech</a><sup class="affiliation-links"><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="Department of Dermatology, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle, U.K." href="#short-view-affiliation-13" ref="linksrc=author_aff">
13
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
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data-ga-label="E A Jones">E A Jones</a><sup class="affiliation-links"><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="Manchester Centre for Genomic Medicine, Division of Evolution &amp; Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, U.K." href="#short-view-affiliation-14" ref="linksrc=author_aff">
14
</a><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="Manchester Centre for Genomic Medicine, St Mary&#x27;s Hospital, Manchester University NHS Foundation Trust, Health Innovation Manchester, Manchester, U.K." href="#short-view-affiliation-15" ref="linksrc=author_aff">
15
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
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data-ga-label="D Lim">D Lim</a><sup class="affiliation-links"><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="Department of Clinical Genetics, Birmingham Women&#x27;s and Children&#x27;s NHS Foundation Trust, Birmingham, U.K." href="#short-view-affiliation-16" ref="linksrc=author_aff">
16
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
href="/?term=Ilchyshyn+A&amp;cauthor_id=31168818"
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data-ga-label="A Ilchyshyn">A Ilchyshyn</a><sup class="affiliation-links"><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="Department of Dermatology, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, U.K." href="#short-view-affiliation-17" ref="linksrc=author_aff">
17
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
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data-ga-label="N Goldstraw">N Goldstraw</a><sup class="affiliation-links"><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="Dermatology Department, Royal Devon and Exeter NHS Foundation Trust, Exeter, U.K." href="#short-view-affiliation-18" ref="linksrc=author_aff">
18
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data-ga-label="M J Cork">M J Cork</a><sup class="affiliation-links"><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="Department of Dermatology, Sheffield Children&#x27;s NHS Foundation Trust, Sheffield, U.K." href="#short-view-affiliation-19" ref="linksrc=author_aff">
19
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
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20
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
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4
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
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data-ga-label="A E Martinez">A E Martinez</a><sup class="affiliation-links"><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="Department of Dermatology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, U.K." href="#short-view-affiliation-21" ref="linksrc=author_aff">
21
</a></sup><span class="comma">,&nbsp;</span></span><span class="authors-list-item "><a class="full-name"
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1
</a><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="St John&#x27;s Institute of Dermatology, King&#x27;s College London, Guy&#x27;s Hospital, London, U.K." href="#short-view-affiliation-2" ref="linksrc=author_aff">
2
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data-ga-label="J A McGrath">J A McGrath</a><sup class="affiliation-links"><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="NIHR Biomedical Research Centre, Guy&#x27;s and St Thomas&#x27; NHS Foundation Trust and King&#x27;s College London, London, U.K." href="#short-view-affiliation-1" ref="linksrc=author_aff">
1
</a><span class="author-sup-separator">&nbsp;</span><a class="affiliation-link" title="St John&#x27;s Institute of Dermatology, King&#x27;s College London, Guy&#x27;s Hospital, London, U.K." href="#short-view-affiliation-2" ref="linksrc=author_aff">
2
</a></sup></span>
</div>
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<div class="affiliations">
<h3 class="title">
Affiliations
</h3>
<ul class="item-list">
<li data-affiliation-id="short-view-affiliation-1"
id="short-view-affiliation-1"
><sup class="key">1</sup> NIHR Biomedical Research Centre, Guy&#x27;s and St Thomas&#x27; NHS Foundation Trust and King&#x27;s College London, London, U.K.</li>
<li data-affiliation-id="short-view-affiliation-2"
id="short-view-affiliation-2"
><sup class="key">2</sup> St John&#x27;s Institute of Dermatology, King&#x27;s College London, Guy&#x27;s Hospital, London, U.K.</li>
<li data-affiliation-id="short-view-affiliation-3"
id="short-view-affiliation-3"
><sup class="key">3</sup> Department of Medical and Molecular Genetics, School of Basic and Medical Biosciences, King&#x27;s College London, Guy&#x27;s Hospital, London, U.K.</li>
<li data-affiliation-id="short-view-affiliation-4"
id="short-view-affiliation-4"
><sup class="key">4</sup> Department of Dermatology &amp; Cutaneous Biology, Thomas Jefferson University, Philadelphia, PA, U.S.A.</li>
<li data-affiliation-id="short-view-affiliation-5"
id="short-view-affiliation-5"
><sup class="key">5</sup> Genetics, Genomics and Cancer Biology, PhD Program, Thomas Jefferson University, Philadelphia, PA, U.S.A.</li>
<li data-affiliation-id="short-view-affiliation-6"
id="short-view-affiliation-6"
><sup class="key">6</sup> Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.</li>
<li data-affiliation-id="short-view-affiliation-7"
id="short-view-affiliation-7"
><sup class="key">7</sup> Biotechnology Research Center, Department of Molecular Medicine, Pasteur Institute of Iran, Tehran, Iran.</li>
<li data-affiliation-id="short-view-affiliation-8"
id="short-view-affiliation-8"
><sup class="key">8</sup> School of Population Health and Environmental Sciences, Faculty of Life Sciences and Medicine, King&#x27;s College London, U.K.</li>
<li data-affiliation-id="short-view-affiliation-9"
id="short-view-affiliation-9"
><sup class="key">9</sup> Department of Dermatology, Nottingham University Hospitals NHS Trust, Nottingham, U.K.</li>
<li data-affiliation-id="short-view-affiliation-10"
id="short-view-affiliation-10"
><sup class="key">10</sup> Department of Dermatology, Birmingham Women&#x27;s and Children&#x27;s NHS Foundation Trust, Birmingham, U.K.</li>
<li data-affiliation-id="short-view-affiliation-11"
id="short-view-affiliation-11"
><sup class="key">11</sup> Department of Dermatology, Bart&#x27;s Health NHS Trust, London, U.K.</li>
<li data-affiliation-id="short-view-affiliation-12"
id="short-view-affiliation-12"
><sup class="key">12</sup> Department of Dermatology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, U.K.</li>
<li data-affiliation-id="short-view-affiliation-13"
id="short-view-affiliation-13"
><sup class="key">13</sup> Department of Dermatology, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle, U.K.</li>
<li data-affiliation-id="short-view-affiliation-14"
id="short-view-affiliation-14"
><sup class="key">14</sup> Manchester Centre for Genomic Medicine, Division of Evolution &amp; Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, U.K.</li>
<li data-affiliation-id="short-view-affiliation-15"
id="short-view-affiliation-15"
><sup class="key">15</sup> Manchester Centre for Genomic Medicine, St Mary&#x27;s Hospital, Manchester University NHS Foundation Trust, Health Innovation Manchester, Manchester, U.K.</li>
<li data-affiliation-id="short-view-affiliation-16"
id="short-view-affiliation-16"
><sup class="key">16</sup> Department of Clinical Genetics, Birmingham Women&#x27;s and Children&#x27;s NHS Foundation Trust, Birmingham, U.K.</li>
<li data-affiliation-id="short-view-affiliation-17"
id="short-view-affiliation-17"
><sup class="key">17</sup> Department of Dermatology, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, U.K.</li>
<li data-affiliation-id="short-view-affiliation-18"
id="short-view-affiliation-18"
><sup class="key">18</sup> Dermatology Department, Royal Devon and Exeter NHS Foundation Trust, Exeter, U.K.</li>
<li data-affiliation-id="short-view-affiliation-19"
id="short-view-affiliation-19"
><sup class="key">19</sup> Department of Dermatology, Sheffield Children&#x27;s NHS Foundation Trust, Sheffield, U.K.</li>
<li data-affiliation-id="short-view-affiliation-20"
id="short-view-affiliation-20"
><sup class="key">20</sup> Department of Dermatology, South Tees Hospitals NHS Foundation Trust, Middlesbrough, U.K.</li>
<li data-affiliation-id="short-view-affiliation-21"
id="short-view-affiliation-21"
><sup class="key">21</sup> Department of Dermatology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, U.K.</li>
</ul>
</div>
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Abstract
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<p>
<strong class="sub-title">
Background:
</strong>
Recessive forms of congenital ichthyosis encompass a group of rare inherited disorders of keratinization leading to dry, scaly skin. So far, 13 genes have been implicated, but there is a paucity of data on genotype-phenotype correlation in some populations.
</p>
<p>
<strong class="sub-title">
Objectives:
</strong>
We compiled an English cohort of 146 individuals with recessive ichthyosis and assessed genotype-phenotype correlation.
</p>
<p>
<strong class="sub-title">
Methods:
</strong>
Deep phenotyping was undertaken by history-taking and clinical examination. DNA was screened for mutations using a next-generation sequencing ichthyosis gene panel and Sanger sequencing.
</p>
<p>
<strong class="sub-title">
Results:
</strong>
Cases were recruited from 13 National Health Service sites in England, with 65% of patients aged &lt; 16 years at enrolment. Pathogenic biallelic mutations were found in 83% of cases, with the candidate gene spread as follows: TGM1 29%, NIPAL4 12%, ABCA12 12%, ALOX12B 9%, ALOXE3 7%, SLC27A4 5%, CERS3 3%, CYP4F22 3%, PNPLA1 2%, SDR9C7 1%. Clinically, a new sign, an anteriorly overfolded ear at birth, was noted in 43% of patients with ALOX12B mutations. The need for intensive care stay (P = 0·004), and hand deformities (P &lt; 0·001), were associated with ABCA12 mutations. Self-improving collodion ichthyosis occurred in 8% of the cases (mostly TGM1 and ALOX12B mutations) but could not be predicted precisely from neonatal phenotype or genotype.
</p>
<p>
<strong class="sub-title">
Conclusions:
</strong>
These data refine genotype-phenotype correlation for recessive forms of ichthyosis in England, demonstrating the spectrum of disease features and comorbidities, as well as the gene pathologies therein. Collectively, the data from these patients provide a valuable resource for further clinical assessment, improving clinical care and the possibility of future stratified management. What's already known about this topic? Recessive forms of ichthyosis are rare but often difficult to diagnose. Mutations in 13 genes are known to cause recessive forms of ichthyosis: ABCA12, ALOX12B, ALOXE3, CERS3, CYP4F22, LIPN, NIPAL4, PNPLA1, SDR9C7, SLC27A4, SULT2B1, ST14 and TGM1. Some phenotypic features may associate with certain gene mutations, but paradigms for genotype-phenotype correlation need refining. What does this study add? The genotypic spectrum of recessive ichthyosis in England (based on 146 cases) comprises TGM1 (29%), NIPAL4 (12%), ABCA12 (12%), ALOX12B (9%), ALOXE3 (7%), SLC27A4 (5%), CERS3 (3%), CYP4F22 (3%), PNPLA1 (2%) and SDR9C7 (1%). New or particular phenotypic clues were defined for mutations in ALOX12B, ABCA12, CYP4F22, NIPAL4, SDR9C7 and TGM1, either in neonates or in later life, which allow for greater diagnostic precision. In around 17% of cases, the molecular basis of recessive ichthyosis remains unknown.
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© 2019 British Association of Dermatologists.
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Oji V, Tadini G, Akiyama M et al. Revised nomenclature and classification of inherited ichthyoses: results of the First Ichthyosis Consensus Conference in Soreze 2009. J Am Acad Dermatol 2010; 63:607-41.
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