title: Efficiency loss due to varying cluster sizes in cluster randomized trials and how to compensate for it: comment on You et al. (2011).
authors.forename: Gerard J P
authors.initials: GJ
authors.lastname: van Breukelen
authors.forename: Math J J M
authors.initials: MJ
authors.lastname: Candel
mesh_terms: D016000:Cluster Analysis; D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D018401:Sample Size