1. Department of Gynaecology and ObstetricsNorth Zealand University Hospital Hilleroed Denmark
2. Department of Gynaecology and ObstetricsAarhus University Hospital Aarhus Denmark
3. The Danish Clinical Registries RKKP Frederiksberg Denmark
4. Department of GynaecologyRigshospitaletCopenhagen University Hospital Copenhagen Denmark
5. Department of Gynaecology and ObstetricsAalborg University Hospital Aalborg Denmark
6. Department of GynaecologyCopenhagen University Hospital Copenhagen Denmark
7. RigshospitaletCopenhagen University Hospital Copenhagen Denmark
8. Department of Gynaecology and ObstetricsZealand University Hospital Roskilde Denmark