1. Centre for Fertility and Health, Norwegian Institute of Public Health, Oslo, Norway
2. Clinical Epidemiology Division, Department of Medicine, Solna, Karolinska Institutet, Stockholm, Sweden
3. Department of Obstetrics and Gynecology, Visby County Hospital, Visby, Sweden
4. Swedish Medical Products Agency, Uppsala, Sweden
5. Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
6. Department of Infection Control and Vaccines, Norwegian Institute of Public Health, Oslo, Norway
7. Department of Non-communicable Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom
8. Department of Health Registry Research and Development, Norwegian Institute of Public Health, Bergen, Norway
9. Department of Obstetrics and Gynecology, Haukeland University Hospital, Bergen, Norway
10. Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
11. Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
12. Department of Women’s Health, Division of Obstetrics, Karolinska University Hospital, Stockholm, Sweden