We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitlePregnancy disorders that lead to delivery before the 28th week of gestation: an epidemiologic approach to classification.AuthorsMcElrath TF; Hecht JL; Dammann O; Boggess K; Onderdonk A; Markenson G; Harper M; Delpapa E; Allred EN; Leviton APublicationAmerican Journal of Epidemiology, 2008, Vol 168, Issue 9, p980ISSN0002-9262Publication typearticleDOI10.1093/aje/kwn202