We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleMerging and emerging cohorts: not worth the wait.AuthorsWillett WC; Blot WJ; Colditz GA; Folsom AR; Henderson BE; Stampfer MJPublicationNature, 2007, Vol 445, Issue 7125, p257ISSN1476-4687Publication typearticleDOI10.1038/445257a