We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleCONSORT statement: extension to cluster randomised trialsAuthorsCampbell, Marion K; Elbourne, Diana R; Altman, Douglas GPublicationBMJ, 2004, Vol 328, Issue 7441, p702ISSN0959-8138Publication typearticleDOI10.1136/bmj.328.7441.702