Cochrane Library This link opens in a new windowThe Cochrane Library is a collection of high-quality databases that consists of the Cochrane Database of Systematic Reviews (CDSR), Cochrane Central Register of Controlled Trials (CENTRAL), Cochrane Clinical Answers, and Epistemonikos Systematic Reviews. CDSR includes all Cochrane Reviews (and protocols) prepared by Cochrane Review Groups. CENTRAL is a highly concentrated source of reports of randomized and quasi-randomized controlled trials. CDAs provide a readable, digestible, clinically-focused entry point to rigorous research from Cochrane Reviews.