[1] Norwegian Univ Sci & Technol, Dept Publ Hlth & Nursing, Postboks 8905, NO-7491 Trondheim, Norway
[2] Nord Trondelag Hosp Trust, Levanger Hosp, Dept Obstet & Gynecol, Levanger, Norway
[3] Mid Norway TkMidt, Ctr Oral Hlth Serv & Res, Trondheim, Norway
[4] Nord Univ, Fac Nursing & Hlth Sci, Levanger, Norway
[5] St Olavs Univ Hosp, Dept Obstet & Gynecol, Trondheim, Norway
[6] Norwegian Univ Sci & Technol, Dept Clin & Mol Med, Trondheim, Norway
[7] Trondheim Reg & Univ Hosp, St Olavs Hosp, Dept Endocrinol, Clin Med, Trondheim, Norway
[8] Univ Oslo, Inst Basic Med Sci, Dept Nutr, Oslo, Norway
[9] Oslo Univ Hosp, Dept Clin Serv, Div Canc Med, Oslo, Norway
[10] Brigham & Womens Hosp, Dept Med, Div Endocrinol Diabet & Hypertens, Boston, MA USA
[11] Harvard Med Sch, Boston, MA USA
[12] Harvard TH Chan Sch Publ Hlth, Dept Epidemiol, Boston, MA USA
[13] Brigham & Womens Hosp, Dept Med, Div Womens Hlth, Boston, MA USA
[14] Brigham & Womens Hosp, Connors Ctr Womens Hlth & Gender Biol, Boston, MA USA