1. AMC; Center for Gynecologic Oncology; Secretariaat H4-214 Meibergdreef 9 Amsterdam Netherlands 1105 AZ
2. Medical Centre Leeuwarden; Department of Obstetrics and Gynecology; P.O. Box 888 Leeuwarden Netherlands 8901 BR
3. Leiden University Medical Center; Department of Obstetrics and Gynaecology; PO Box 9600 Leiden Netherlands 2300 RC