Literature search using PubMed: an essential tool for practicing evidence- based medicine.

Efficient literature search is essential to the practice of Evidence-Based Medicine. PubMed provides free access to one of the largest searchable biomedical databases. Efficient literature search using PubMed requires a good understanding of the available search strategies and tools. In this article we present a step-by-step approach for performing literature search using PubMed. Several PubMed tools including 'Single Citation Matcher', 'Clinical Queries', 'Clipboard', 'Field Tags', and 'Cubby' are highlighted using case based scenarios.