EBM Reviews - Cochrane Central Register of Controlled Trials
Cochrane Central Register of Controlled Trials contains over 300,000 bibliographic references to controlled trials in health care. References are identified by searching MEDLINE and EMBASE, and by hand searching the journal literature. Quality control standards are followed to ensure that only reports of definite randomized controlled trials or controlled clinical trials are included.
Leads to citations to journal articles, conference proceedings, and other sources.