title: Use of controls in clinical trials.
authors.affiliation: Statistics and Research Design.
authors.forename: Nikolaos
authors.initials: N
authors.lastname: Pandis
mesh_terms: D015982:Bias; D035061:Control Groups; D015987:Effect Modifier, Epidemiologic; D006801:Humans; D015588:Observer Variation; D015990:Placebo Effect; D016032:Randomized Controlled Trials as Topic; D012075:Remission, Spontaneous; D012107:Research Design; D015983:Selection Bias