1. Division of Obstetrics and Gynaecology Oslo University Hospital Oslo
2. Institute of Clinical Medicine, Faculty of Medicine University of Oslo Oslo
3. Division of Paediatric and Adolescent Medicine Oslo University Hospital Oslo Norway
4. Centre for Laboratory Medicine Østfold Hospital Trust Kalnes Norway
5. Department of Chemistry, Biotechnology and Food science Norwegian University of Life Sciences Ås Norway
6. Oslo Centre for Biostatistics and Epidemiology Oslo University Hospital Oslo Norway
7. VID Specialized University Oslo Norway
8. Department of Women's and Children's Health Karolinska Institutet Stockholm Sweden
9. Astrid Lindgren Children's Hospital Karolinska University Hospital Stockholm Sweden
10. Department of Dermatology Oslo University Hospital Oslo Norway
11. Department of Gynecology and Obstetrics Østfold Hospital Trust Kalnes Norway
12. Department of Obstetrics and Gynecology, Sahlgrenska Academy Gothenburg University Gothenburg Sweden