1. Department of Obstetrics and Gynaecology, Geneva University Hospitals, Geneva, Switzerland; Department of Obstetrics and Gynaecology, Provincial Hospital, Maroua, Cameroon
2. Department of Obstetrics and Gynaecology, Geneva University Hospitals, Geneva, Switzerland
3. Department of Pathology and Laboratory Medicine at Roswell Park Cancer Institute, NY, USA
4. Geneva Cancer Registry, Institute of Social and Preventive Medicine, University of Geneva, Geneva, Switzerland