1. Elena Venizelou Maternity Hospital; Department of Obstetrics and Gynaecology; 1 Elena Venizelou Square Athens Greece 11521
2. Scientific Institute of Public Health; Unit of Cancer Epidemiology; Juliette Wytsmanstraat 14 Brussels Belgium 1050
3. McMaster University; Department of Clinical Epidemiology and Biostatistics; 1200 Main Street West Hamilton ON Canada L8N 3Z5
4. Newcastle University; Institute of Health & Society; Medical School New Build Richardson Road Newcastle upon Tyne UK NE2 4AX
5. Royal Preston Hospital, Lancashire Teaching Hospital NHS Trust; Gynaecological Oncology Unit; Sharoe Green Lane Fullwood Preston Lancashire UK PR2 9HT
6. McMaster University; Departments of Health Research Methods, Evidence, and Impact and of Medicine; 1280 Main Street West Hamilton ON Canada L8N 4K1
7. Ioannina University Hospital; Department of Obstetrics and Gynaecology; Ioannina Greece 45001
8. Sciensano; Unit of Cancer Epidemiology, Belgian Cancer Centre; Juliette Wytsmanstreet 14 Brussels Belgium B-1050