We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleDesign and analysis of group-randomized trials: a review of recent methodological developments.AuthorsMurray DM; Varnell SP; Blitstein JLPublicationAmerican journal of public health, 2004, Vol 94, Issue 3, p423ISSN0090-0036Publication typearticleDOI10.2105/ajph.94.3.423