title: Interventional trials: an overview of design alternatives.
authors: University of Ottawa Center for Transfusion Research, Clinical Epidemiology Program, Ottawa Health Research Institute, Ottawa, Ontario, Canada.
authors: Alan
authors: A
authors: Tinmouth
authors: Paul
authors: P
authors: Hebert
mesh_terms: D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D012107:Research Design