We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleStudy of environmental, social, and paternal factors in preterm delivery using sibs and half sibs. A population-based study in DenmarkAuthorsBasso, O.; Olsen, J.; Christensen, K.PublicationJournal of Epidemiology & Community Health, 1999, Vol 53, Issue 1, p20ISSN0143-005xPublication typearticleDOI10.1136/jech.53.1.20