title: Explaining the unbiased creation of treatment comparison groups.
authors: Iain
authors: I
authors: Chalmers
mesh_terms: D015986:Confounding Factors, Epidemiologic; D006266:Health Education / Q000379:methods; D006801:Humans; D015588:Observer Variation; D011897:Random Allocation; D016032:Randomized Controlled Trials as Topic; D012107:Research Design; D012660:Semantics; D016037:Single-Blind Method