Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleSelected statistical issues in group randomized trials.AuthorsFeng Z; Diehr P; Peterson A; McLerran DPublicationAnnual review of public health, 2001, Vol 22, p167ISSN0163-7525Publication typearticleDOI10.1146/annurev.publhealth.22.1.167