title: Why are so few randomized trials useful, and what can we do about it?
authors.forename: Merrick
authors.initials: M
authors.lastname: Zwarenstein
authors.forename: Andy
authors.initials: A
authors.lastname: Oxman
mesh_terms: D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000592:standards*; D012106:Research / Q000592:standards*; D012107:Research Design / Q000592:standards