title: Methodology for clinical trials in rheumatology: logical foundations.
authors.forename: R J
authors.initials: RJ
authors.lastname: Cook
authors.forename: V T
authors.initials: VT
authors.lastname: Farewell
authors.forename: D D
authors.initials: DD
authors.lastname: Gladman
mesh_terms: D002986:Clinical Trials as Topic / Q000379:methods*; D006801:Humans; D015233:Models, Statistical; D017063:Outcome Assessment, Health Care / Q000379:methods*; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D012219:Rheumatology / Q000379:methods*; D016896:Treatment Outcome