1. Department of Obstetrics and Gynaecology, Southend University Hospital NHS Foundation Trust, Westcliff on Sea, Essex SS0 0RY, UK
2. Gynaecological Oncology Unit, Royal Preston Hospital, Sharoe Green Lane, Fulwood, Preston, Lancashire PR2 9HT, UK
3. Oaklands Surgery, Central Canvey Primary Care Centre, Long Road, Canvey Island, Essex SS8 0JA, UK