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This short video demonstrates how to use the PubMed filter sidebar. These filters replace
the Limits page, bringing the same functionality as Limits directly to your search results page.
My example search uses the query, cancer. In the sidebar you see a default set of filter
categories. To change this list, click "Show additional filters", select the desired categories,
and then click Show. Note that 'Article types' and 'Publication dates' cannot be removed.
To narrow my search results, I'll filter for articles of type, Clinical Trial, and for
those published in the last 5 years. A "Filters activated" message appears. Just as with limits,
once a filter is active, it remains in effect for subsequent searches until it is cleared.
You can clear active filters in several ways. Use the "Clear all" links, the "clear' link
for all filters within a category, or click an active filter. Within a category, applying
additional filters actually expands your search rather than narrows it. This is because the
additional filter is included as an OR term. For example, adding Review expands my results
today from more than 27,000 to more than 104,000. If you wanted to narrow your search with Review,
use Search Details to change the OR to an AND. I'll leave Review as it is for now.
Notice that only valid filter options for your particular result set are available.
For example, I'll add Legal Cases under Article types. Now when I uncheck Review, the Legal
Cases filter disappears, because none of the citations in this smaller set are tagged with
type, Legal Cases.
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