title: Efficacy research and unanswered clinical questions.
authors.forename: Sunita
authors.initials: S
authors.lastname: Vohra
authors.forename: Larissa
authors.initials: L
authors.lastname: Shamseer
authors.forename: Margaret
authors.initials: M
authors.lastname: Sampson
mesh_terms: D035843:Biomedical Research; D057186:Comparative Effectiveness Research; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D012107:Research Design; D018401:Sample Size