title: A question of evidence.
authors.affiliation: The BMJ.
authors.forename: Theodora
authors.initials: T
authors.lastname: Bloom
mesh_terms: D003625:Data Collection / Q000379:methods / Q000592:standards; D019317:Evidence-Based Medicine; D006801:Humans; D000069342:Medical Overuse / Q000517:prevention & control*; D058996:Quality Improvement; D016032:Randomized Controlled Trials as Topic / Q000379:methods / Q000592:standards; D035703:Therapies, Investigational / Q000592:standards*