We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleSecular trends in preterm birth: a hospital-based cohort study.AuthorsKramer MS; Platt R; Yang H; Joseph KS; Wen SW; Morin L; Usher RHPublicationJAMA, 1998, Vol 280, Issue 21, p1849ISSN0098-7484Publication typearticleDOI10.1001/jama.280.21.1849