1. Department of Clinical Science University of Bergen Bergen Norway
2. Department of Obstetrics and Gynecology Haukeland University Hospital Bergen Norway
3. Department of Global Public Health and Primary Care University of Bergen Bergen Norway
4. Department of Pediatrics Haukeland University Hospital Bergen Norway
5. Department of Information and Service Finnish Institute for Health and Welfare Helsinki Finland
6. Department of Molecular Medicine and Surgery Karolinska Institute Stockholm Sweden