1. Department of Obstetrics and Gynaecology Centre of Perinatal Medicine and Health Institute of Clinical Sciences Sahlgrenska AcademyUniversity of Gothenburg Gothenburg Sweden
2. Södra Älvsborg Hospital Borås Sweden
3. Department of Obstetrics Region Vastra Gotaland Sahlgrenska University Hospital Gothenburg Sweden
4. Department of Obstetrics and Gynaecology Faculty of Medicine and Health Örebro University Örebro Sweden
5. Department of Clinical Science, Intervention and Technology Karolinska Institute Stockholm Sweden
6. Centre for Fetal Medicine Karolinska University Hospital Stockholm Sweden
7. Centre for Clinical Research Dalarna Falun Hospital Falun Sweden
8. Department of Obstetrics and Gynaecology Skåne University Hospital Malmö Sweden
9. Department of Medical Sciences Malmö Lund University Lund Sweden