1. Section for International Health, Department of General Practice and Community of Medicine, Institute of Health and Society, University of Oslo, P.O. BOX 1130, Blindern, 0318 Oslo, Norway
2. Reproductive and Child Health Programme, Ministry of State for Health and Social Welfare, Banjul, Gambia
3. National Resource Centre for Women's Health, Department of Obstetrics and Gynaecology, Oslo University Hospital, Postboks 4950, 0424 Oslo, Norway