1. Department of Obstetrics and Gynaecology Centre of Perinatal Medicine & Health Institute of Clinical Sciences Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
2. Department of Obstetrics and Gynaecology Region Västra Götaland Sahlgrenska University Hospital Gothenburg Sweden
3. Department of Women’s and Children’s Health Karolinska Institute Karolinska University Hospital Stockholm Sweden
4. Institute of Health and Caring Sciences Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
5. Department of Obstetrics and Gynaecology Faculty of Medicine and Health Örebro University Örebro Sweden
6. Department of Women’s and Children’s Health Uppsala University Uppsala Sweden
7. Center for Clinical Research Dalarna Falu Hospital Falun Sweden
8. School of Public Health & Community Medicine Institute of Medicine Sahlgrenska Academy University of Gothenburg Gothenburg Sweden