title: The randomised controlled trial to meta-analysis ratio: original data versus systematic reviews in the medical literature.
authors.forename: Mark J
authors.initials: MJ
authors.lastname: Bolland
authors.forename: Andrew
authors.initials: A
authors.lastname: Grey
authors.forename: Ian R
authors.initials: IR
authors.lastname: Reid
mesh_terms: D016239:MEDLINE / Q000706:statistics & numerical data; D015201:Meta-Analysis as Topic; D010506:Periodicals as Topic / Q000706:statistics & numerical data* / Q000639:trends; D016032:Randomized Controlled Trials as Topic; D012196:Review Literature as Topic