title: Understanding controlled trials. Randomising groups of patients.
authors.affiliation: National Primary Care Research and Development Centre, University of Manchester, Manchester M13 9PL.
authors.forename: C
authors.initials: C
authors.lastname: Roberts
authors.forename: B
authors.initials: B
authors.lastname: Sibbald
mesh_terms: D006126:Group Processes; D016032:Randomized Controlled Trials as Topic / Q000379:methods*