1. Department of Public Health, Aarhus University, Aarhus 8000, Denmark
2. Department of Gynecology and Obstetrics, North Denmark Regional Hospital, Hjørring 9800, Denmark
3. School of Public Health, University of Ghana, Accra, Ghana
4. Department of Public Health, University of Copenhagen, Copenhagen, Denmark
5. Department of Pediatrics, Rigshospitalet, Copenhagen Ø 2100, Denmark
6. OB-GYN, Slagelse Hospital, Slagelse 4200, Denmark
7. Department of Clinical Medicine, University of Copenhagen, Copenhagen N 2200, Denmark