1. Unit of Cancer Epidemiology, Belgian Cancer Centre; Sciensano ; Brussels Belgium
2. Unit of Cancer Epidemiology; Scientific Institute of Public Health; Brussels Belgium
3. General Practice; Academisch Centrum voor Huisartsgeneeskunde; KU Leuven Belgium
4. Department of Obstetrics & Gynaecology; Ioannina University Hospital; Ioannina Greece
5. Gynaecological Oncology Unit; Royal Preston Hospital, Lancashire Teaching Hospital NHS Trust; Preston UK
6. Department of Obstetrics and Gynaecology; Coombe Lying-In Hospital; Dublin 8 Ireland