[1] Rigshosp, Copenhagen Univ Hosp, Juliane Marie Ctr, Res Unit Womens & Childrens Hlth, DK-2100 Copenhagen, Denmark
[2] Rigshosp, Copenhagen Univ Hosp, Dept Obstet, Blegdamsvej 9, DK-2100 Copenhagen, Denmark
[3] Copenhagen Univ Hosp, Amager Hvidovre Hosp, Dept Obstet & Gynaecol, Kettegard Alle 30, DK-2650 Hvidovre, Denmark
[4] Univ Copenhagen, Fac Hlth & Med Sci, Dept Clin Med, Blegdamsvej 3, DK-2100 Copenhagen, Denmark
[5] Univ Copenhagen, Mental Hlth Ctr Glostrup, DK-2600 Glostrup, Denmark