1. Royal United Hospital; Cochrane Gynaecological, Neuro-oncology and Orphan Cancer Group; Education Centre Bath UK BA1 3NG
2. Christie Hospital NHS Foundation Trust; The Department of Surgery; Wilmslow Road Manchester UK M20 4BX
3. Julius Center for Health Sciences and Primary Care / University Medical Center Utrecht; Cochrane Netherlands; Room Str. 6.131 PO Box 85500 Utrecht Netherlands 3508 GA
4. St. Mary's Hospital; Academic Unit of Obstetrics and Gynaecology, University of Manchester; Hathersage Road Whitworth Park Manchester UK M13 0JH