1. Department of Obstetrics and Gynecology; Groote Schuur Hospital/University of Cape Town; Cape Town South Africa
2. South African Medical Research Council/University of Cape Town Gynaecological Cancer Research Centre (SA MRC/UCT GCRC); Cape Town South Africa
3. Department of Obstetrics, Gynecology and Reproductive Sciences; University of Pittsburgh School of Medicine; Pittsburgh PA USA
4. Department of Pathology, Hospital de la Santa Creu i Sant Pau; Autonomous University of Barcelona; Barcelona Spain