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Searching is an iterative process. The first basic search you do on a topic will rarely retrieve all of the related articles. In both patient care and research, it is important to select the best evidence available from all of the related articles. Use your initial search results to look for more related articles.
Searches that find more than one result are displayed in Summary format.
Change the display to Citation to find more search words to use to improve your search.
Change the display to AbstractPlus to find a few more articles through PubMed's Related Links feature.
MeSH (Medical Subject Heading) Terms are listed after the abstract in Citation display. These terms are a good source for additional words to add to your search.
MeSH Terms in the results of the search basketball AND mouthguards often include the term Mouth Protectors.
Use the following format to add this term to your search:
basketball AND (mouthguards OR mouth protectors)
Articles displayed under Related Links in AbstractPlus display are retrieved by an automated search. They can sometimes provide an easy way to find additional articles on your topic.
 Basic Searches Limits 
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