1. Centre of Perinatal Medicine and Health, Department of Obstetrics and Gynecology, Institute of Clinical Sciences, Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
2. Region Västra Götaland, Sahlgrenska University Hospital, Department of Obstetrics Gothenburg Sweden
3. Södra Älvsborg Hospital Borås Sweden
4. Department of Clinical Science, Intervention and Technology, Karolinska Institutet Stockholm Sweden
5. Centre for Fetal Medicine Karolinska University Hospital Stockholm Sweden
6. School of Public Health and Community Medicine, Institute of Medicine University of Gothenburg Gothenburg Sweden
7. Department of Obstetrics and Gynecology Skåne University Hospital Malmö Sweden
8. Department of Clinical Sciences Malmö Lund University Malmö Sweden