title: Use of covariates in randomized controlled trials.
authors.forename: Gerard J P
authors.initials: GJ
authors.lastname: Van Breukelen
authors.forename: Koene R A
authors.initials: KR
authors.lastname: Van Dijk
mesh_terms: D000704:Analysis of Variance; D002986:Clinical Trials as Topic; D003627:Data Interpretation, Statistical; D006801:Humans; D016032:Randomized Controlled Trials as Topic