NEJM -- Searching for the Right Search -- Reaching the Medical Literature
There are many search engines and many ways to gain access to the online medical literature. At the moment, however, Google is the most widely used. Other widely used search tools are PubMed, a federal government portal that offers access to the enormous database of citations and abstracts at the National Library of Medicine; Google Scholar, which specifically searches the scholarly literature; and Yahoo, the search engine of the Sunnyvale, California, company of the same name. These search engines are available to anyone who has an Internet connection; none require registration, and searching is free of charge.