1. Department of Gynaecology Leiden University Medical Center Leiden The Netherlands
2. Department of Pathology Leiden University Medical Center Leiden The Netherlands
3. Department of Medical Oncology, Oncode Institute Leiden University Medical Center Leiden The Netherlands
4. Department of Gynaecology Haga Hospital Den Haag The Netherlands
5. Department of Gynaecology Maastricht University Medical Center Maastricht The Netherlands
6. Department of Gynaecology Catharina Hospital Eindhoven The Netherlands