1. Centre for Clinical Education, Rigshospitalet Capital Region and University of Copenhagen Copenhagen Denmark
2. Department of Obstetrics and Gynecology, Juliane Marie Centre, Rigshospitalet Capital Region and University of Copenhagen Copenhagen Denmark
3. Faculty of Health Aarhus University Aarhus Denmark
4. Department of Obstetrics and Gynecology Nordsjælland Hospital Hillerød, University of Copenhagen Hillerød Denmark
5. Department of Biostatistics University of Copenhagen Copenhagen Denmark
6. Department of Obstetrics and Gynecology Næstved Hospital, University of Copenhagen Næstved Denmark