1. Department of Surgery, Leiden University Medical Centre, Leiden, The Netherlands
2. Department of Gynaecology, Leiden University Medical Centre, Leiden, The Netherlands
3. Department of Clinical Oncology, Leiden University Medical Centre, Leiden, The Netherlands
4. Department of Radiotherapy, The Netherlands Cancer Institute, Amsterdam, The Netherlands
5. Department of Surgery, University Medical Centre Groningen, Groningen, The Netherlands
6. Department of Surgery, Catharina Hospital, Eindhoven, The Netherlands