1. Department of Midwifery and Therapeutic Sciences, University College Copenhagen, Sigurdsgade 26, 2200 Copenhagen, Denmark
2. Department of Gynaecology and Obstetrics, Holbæk Hospital, Smedelundsgade 60, 4300 Holbæk, Denmark
3. Department of Obstetrics, Slagelse Hospital, Fælledvej 13, 4200 Slagelse, Denmark
4. Department of Gynaecology and Obstetrics, Zealand University Hospital Roskilde, Sygehusvej 10, 4000 Roskilde, Denmark
5. Department of Psychology, Copenhagen University, Øster Farimagsgade 2A, 1350 Copenhagen, Denmark
6. The Family Clinic, Department of Obstetrics and Gynaecology, Amager and Hvidovre Hospital, Pavillon 4, Østre Hospitalsvej 5A, 2650 Hvidovre, Denmark
7. Center for Clinical Research and Prevention, Bispebjerg and Frederiksberg University Hospital, The Capital Region of Denmark, Nordre Fasanvej 57, 2000 Frederiksberg, Denmark