1. Department of Public Health and General Practice, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
2. Norwegian Centre for Violence and Traumatic Stress Studies, Oslo, Norway.
3. Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
4. Department of Pharmacoepidemiology, Norwegian Institute of Public Health, Oslo, Norway.
5. Department of Obstetrics and Gynaecology, St. Olavs University Hospital, Trondheim, Norway.