title: Randomized and nonrandomized clinical studies: statistical considerations.
authors.forename: S G
authors.initials: SG
authors.lastname: Baker
authors.forename: K S
authors.initials: KS
authors.lastname: Lindeman
mesh_terms: D000776:Anesthesiology; D002986:Clinical Trials as Topic; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D012107:Research Design