1. Department of Community Medicine and Global Health, Institute of Health and Society, University of Oslo, Oslo, Norway
2. Department of General Practice, Institute of Health and Society, University of Oslo, Oslo, Norway
3. Oslo Accident and Emergency Outpatient Clinic, Department of Emergency General Practice, City of Oslo Health Agency, Oslo, Norway
4. Department of Obstetrics, Division of Obstetrics and Gynaecology, Oslo University Hospital, Oslo, Norway