The Cochrane Library contains high-quality, independent evidence to inform healthcare decision-making. This database includes the Cochrane Database of Systematic Reviews, the Database of Abstracts of Reviews of Effects, the Cochrane Central Register of Controlled Trials, the Cochrane Database of Methodology Reviews, the The Cochrane Methodology Register, the Health Technology Assessment Database, and the NHS Economic Evaluation Database.
This website can be accessed here:
http://www3.interscience.wiley.com/cgi-bin/mrwhome/106568753/HOME?CRETRY=1&SRETRY=0