title: Cluster randomised trials: time for improvement. The implications of adopting a cluster design are still largely being ignored.
authors.forename: M K
authors.initials: MK
authors.lastname: Campbell
authors.forename: J M
authors.initials: JM
authors.lastname: Grimshaw
mesh_terms: D016000:Cluster Analysis; D016032:Randomized Controlled Trials as Topic / Q000379:methods / Q000592:standards*