1. Department of Obstetrics and Gynecology, John Radcliffe Hospital, Oxford University Hospitals, NHS Foundation Trust, Oxford OX3 9DU, UK
2. Department of Clinical and Experimental Sciences, Obstetrics and Gynecology, University of Brescia, 25100 Brescia, Italy
3. Department of Gynaecological Oncology, Churchill Hospital, Oxford University Hospitals, NHS Foundation Trust, Oxford OX3 7LE, UK
4. Department of Clinical Oncology, Churchill Hospital, Oxford University Hospitals, NHS Foundation Trust, Oxford OX3 7LE, UK
5. Nuffield Department of Women’s Reproductive Health, Medical Sciences Division, Oxford University, Oxford OX3 9DU, UK