title: Researching outcomes of educational interventions. Initial formation of unbiased groups is most important issue in randomised controlled trials.
authors: Carole J
authors: CJ
authors: Torgerson
mesh_terms: D004501:Education, Medical; D004521:Educational Measurement / Q000379:methods*; D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D012107:Research Design