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Clinicians' guide to new tools and features of PubMed.

Practicing clinicians need to have the skills required to obtain up- to-date medical information to address both the expansion of scientific knowledge and patients' increasing use of the Internet. PubMed (www.pubmed.gov) allows clinicians free access to the largest biomedical resource available. This article is the third in a Mayo Clinic Proceedings series designed specifically to help clinicians unlock the tools and information available through this valuable resource.