We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitlePreterm birth in Sweden 1973-2001: rate, subgroups, and effect of changing patterns in multiple births, maternal age, and smoking.AuthorsMorken NH; Källen K; Hagberg H; Jacobsson BPublicationActa obstetricia et gynecologica Scandinavica, 2005, Vol 84, Issue 6, p558ISSN0001-6349Publication typearticleDOI10.1111/j.0001-6349.2005.00765.x