title: Changes to the Cochrane Library during the Cochrane Collaboration's first 20 years.
authors: Cochrane Editorial Unit, Cochrane, London, UK.
authors: Harriet
authors: H
authors: MacLehose
authors: John
authors: J
authors: Hilton
mesh_terms: D016206:Databases, Bibliographic / Q000266:history / Q000706:statistics & numerical data; D049673:History, 20th Century; D049674:History, 21st Century; D007391:International Cooperation / Q000266:history; D046609:Libraries, Digital / Q000266:history / Q000458:organization & administration* / Q000706:statistics & numerical data; D011643:Publishing / Q000706:statistics & numerical data; D016032:Randomized Controlled Trials as Topic; D012196:Review Literature as Topic