1. Department of Obstetrics and Gynecology Aarhus University Hospital Aarhus Denmark
2. Department of Clinical Medicine Aarhus University Aarhus Denmark
3. Department of Clinical Epidemiology Aarhus University Hospital Aarhus Denmark
4. Department of Obstetrics Copenhagen University Hospital Rigshospitalet Denmark
5. Department of Clinical Medicine University of Copenhagen Copenhagen Denmark
6. Department of Biomedicine Aarhus University Aarhus Denmark