reviews of research on the effects of health care interventions. Its primary section, the Cochrane Database of Systematic Reviews, contains more than 1,370 regularly updated full-text reviews mainly of randomized controlled trials.
is a free full-text archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health's National Library of Medicine (NIH/NLM).
Brings together free, full-text scholarly articles from hundreds of universities and colleges worldwide including a growing collection of peer-reviewed journal articles, book chapters, dissertations, working papers, conference proceedings, and other original scholarly work.