title: The Cochrane Collaboration.
authors.forename: A
authors.initials: A
authors.lastname: Levin
mesh_terms: D016206:Databases, Bibliographic; D004813:Epidemiology / Q000266:history; D019317:Evidence-Based Medicine; D049673:History, 20th Century; D006801:Humans; D015201:Meta-Analysis as Topic; D016032:Randomized Controlled Trials as Topic / Q000266:history / Q000706:statistics & numerical data; D012042:Registries; D012196:Review Literature as Topic; D006113:United Kingdom