[1] Karolinska Inst, Dept Med Epidemiol & Biostat, Stockholm, Sweden
[2] Orebro Univ Hosp, Dept Pediat, Orebro, Sweden
[3] Univ Nottingham, Sch Med, City Hosp, Div Epidemiol & Publ Hlth, Nottingham, England
[4] Columbia Univ Coll Phys & Surg, Dept Med, 630 W 168th St, New York, NY 10032 USA
[5] Karolinska Inst, Dept Med, Clin Epidemiol Div, Solna, Sweden
[6] Ctr Registers Vastra Gotaland, Natl Diabet Register, Vastra Gotaland, Sweden
[7] Univ Gothenburg, Sahlgrenska Acad, Inst Med, Dept Mol & Clin Med, Gothenburg, Sweden
[8] Karolinska Inst, Dept Womens & Childrens Hlth, Stockholm, Sweden
[9] Statens Serum Inst, Dept Epidemiol Res, Copenhagen, Denmark