Cochrane Central Register of Controlled Trials (CENTRAL)
Cochrane Central Register of Controlled Trials is a database of bibliographic reports of randomized controlled trials. CENTRAL is created from many trusted sources. Most records come from bibliographic databases (mainly Pubmed and Embase). They also come from other published and unpublished sources, including CINAHL, ClinicalTrials.gov and the WHO's International Clinical Trials Registry Platform.