We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleSimple sample size calculation for cluster-randomized trials.AuthorsHayes RJ; Bennett SPublicationInternational journal of epidemiology, 1999, Vol 28, Issue 2, p319ISSN0300-5771Publication typearticleDOI10.1093/ije/28.2.319