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<div class="actions">March 01, 2006 <span class="status">[posted]</span>
<br />
March 15, 2006
<span class="status">
[<a href="#note">Editor's note added</a>]
</span>
<br />
January 29, 2007
<span class="status">
[<a href="#note1">Editor's note added</a>]
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<h1>PubMed<span class="registered">&#174;</span> Limits Page Updated</h1>
<p class="editorsnote">[Editor's Note: This feature was implemented in PubMed on March 15, 2006.] </p>
<p class="editorsnote">[Editor's Note: An additional revision to Limits was made after this article was published. For more information, see: <a href="//www.nlm.nih.gov/pubs/techbull/ma06/ma06_technote.html#12">PubMed<span class="registered">&#174;</span> Limits Page Revised. Technical Notes. NLM Tech Bull. 2006 Mar-Apr;(349):e1.</a>] </p>
<img src="../new_tb_graphics/t.gif" class="initcap" alt=""
width="35" height="43" />
<p class="first">
<span class="initcap">t</span>
he PubMed Limits page will soon be redesigned to provide an improved interface to limit your search by age group, gender, human or animal studies, languages, publication types, dates and other parameters. Click the Limits tab to display the Limits page.
</p>
<p>
Enhancements include new limits such as "Links to free full text," the ability to choose one or more selections under categories such as Languages, and a search builder for authors and journals (see <a href="#fig1">Figure 1</a>).
</p>
<div class="figure" style="width: 504px;">
<a name="fig1" id="fig1">
<img src="graphics/limits_fig1.gif"
alt="Screen capture of citation context menu."
title="" width="502" height="429" /><br />
<strong>Figure 1: The new Limits page (partially shown).</strong>
</a>
</div>
<h2>Searching by Author or Journal</h2>
<p>
To search by author, click <strong>Add Author</strong>. An author search box will display. The author search box includes an autocomplete feature; enter a name in the Author name box and you will see a list of suggested names that gets shorter as you type more letters. As soon as you see the author name you are looking for, you may select that name (see <a href="#fig2">Figure 2</a>).
</p>
<div class="figure" style="width: 504px;">
<a name="fig2" id="fig2">
<img src="graphics/limits_fig2.gif"
alt="Screen capture of citation context menu."
title="" width="502" height="212" /><br />
<strong>Figure 2: Add Author on the Limits page.</strong>
</a>
</div>
<p>
To add additional authors, click the <strong>Add Another Author</strong> link to open another author search box. The default author search is to include all author names in your search. To change this to search for any authors you selected click the radio button from <strong>All these authors</strong> to <strong>Any of these</strong> (see <a href="#fig3">Figure 3</a>). Click the remove link to delete an author search box.
</p>
<div class="figure" style="width: 504px;">
<a name="fig3" id="fig3">
<img src="graphics/limits_fig3.gif"
alt="Screen capture of citation context menu."
title="" width="502" height="145" /><br />
<strong>Figure 3: Author radio button on the Limits page.</strong>
</a>
</div>
<p>
Author names will automatically move to the PubMed search box when you click Go. Selected limits will be activated for any subsequent searches except for authors and journals. Author and journal selections will only be included in subsequent searches if they are not cleared from the PubMed search box (see <a href="#fig4">Figure 4</a>).
</p>
<p>
When Limits are "in effect," a check will appear in the Limits tab and your selected limits will display in a yellow bar. To turn off limits click off the Limits tab check box and run a new search.
</p>
<div class="figure" style="width: 501px;">
<a name="fig4" id="fig4">
<img src="graphics/limits_fig4.gif"
alt="Screen capture of citation context menu."
title="" width="499" height="218" /><br />
<strong>Figure 4: Search results with Limits set to English.</strong>
</a>
</div>
<p>
To limit your search to a journal, click <strong>Add Journal</strong>. A journal search box will display. The journal search box also includes an autocomplete feature; enter a name in the journal name box and you will see a list of suggested names that gets shorter as you type more letters. As soon as you see the journal title you are looking for, you may select it. To add additional journals, click the <strong>Add Another Journal</strong> link to open another journal search box. Search results will include any of the selected journals. Journals will automatically move to the PubMed search box when you click Go. Author and journal selections will only be included in subsequent searches if they are not cleared from the PubMed search box (see <a href="#fig4">Figure 4</a>).
</p>
<h2><a name = "full">Full</a> Text, Free Full Text, and Abstracts</h2>
<p>
To limit your search results to only citations that include a link to full text, a link to free full text, or an abstract, click the appropriate checkboxes (see <a href="#fig5">Figure 5</a>).
</p>
<div class="figure" style="width: 504px;">
<a name="fig5" id="fig5">
<img src="graphics/limits_fig5.gif"
alt="Screen capture of citation context menu."
title="" width="502" height="59" /><br />
<strong>Figure 5: Full Text, Free Full Text, and Abstracts
Limits boxes.</strong>
</a>
</div>
<h2>Dates</h2>
<p>
You may limit your search to articles published or added to PubMed by a pre-set date range (see <a href="#fig6">Figure 6</a>) or you may enter any desired date range (see <a href="#fig7">Figure 7</a>).
</p>
<div class="figure" style="width: 504px;">
<a name="fig6" id="fig6">
<img src="graphics/limits_fig6.gif"
alt="Screen capture of citation context menu."
title="" width="502" height="165" /><br />
<strong>Figure 6: Dates pull-down menu.</strong>
</a>
</div>
<div class="figure" style="width: 504px;">
<a name="fig7" id="fig7">
<img src="graphics/limits_fig7.gif"
alt="Screen capture of citation context menu."
title="" width="502" height="122" /><br />
<strong>Figure 7: User-specified published date range.</strong>
</a>
</div>
<h2>Additional Limits Categories</h2>
<p>
Limits categories for Humans or Animals, Gender, Languages, Subsets, Type of Article (Publication Types) and Ages have been modified to allow users to choose multiple selections within each category. The complete lists of languages and publication types are also now available under the labels: More Languages and More Publication Types.
</p>
<p>
Scroll through the Subsets category to display topics such as Systematic Reviews, journal groups such as nursing journals, and more subsets such as PubMed Central (see <a href="#fig8">Figure 8</a>).
</p>
<div class="figure" style="width: 504px;">
<a name="fig8" id="fig8">
<img src="graphics/limits_fig8.gif"
alt="Screen capture of citation context menu."
title="" width="502" height="450" /><br />
<strong>Figure 8: Limits categories.</strong>
</a>
</div>
<p>
Note: Search limits may exclude in process and publisher-supplied citations (see <a href="#fig9">Figure 9</a>).
</p>
<div class="figure" style="width: 504px;">
<a name="fig9" id="fig9">
<img src="graphics/limits_fig9.gif"
alt="Screen capture of citation context menu."
title="" width="502" height="255" /><br />
<strong>Figure 9: Search for Psoriasis with multiple Limits selected.</strong>
</a>
</div>
<h2>Tag Terms</h2>
<p>
To limit untagged search terms to a specific citation field or by Text Word, choose a field from the Tag Terms All Fields menu located at the bottom of the PubMed Limits page.
</p>
<p>
<strong>Go</strong> and <strong>Clear All Limits</strong> buttons are available at the bottom of the Limits page. The Go button function at the top and bottom of the page is equivalent.
</p>
<p>
Please see the PubMed online <a href="//www.ncbi.nlm.nih.gov/books/NBK3830/">Help</a> for an explanation of categories and selections in Limits.
</p>
<p class="authors">
By
Kathi Canese<br />
National Center for Biotechnology Information<br />
</p>
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<!--************************CHANGE CITATION INFORMATION BELOW*****************************-->
<p class="citation">Canese K. PubMed<span class="registered">&#174;</span> Limits Page Updated. NLM Tech Bull. 2006 Mar-Apr;(349):e2. </p>
<!--************************END CITATION INFORMATION**************************************-->
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