1. Department of Clinical Sciences at Danderyd Hospital Karolinska Institutet Stockholm Sweden
2. Department of Obstetrics and Gynecology Danderyd Hospital Stockholm Sweden
3. Department of Obstetrics and Gynecology and Department of Biomedical and Clinical Sciences Linköping University Linköping Sweden
4. Department of Obstetrics and Gynecology, Faculty of Medicine and Health Örebro University Linköping Sweden