1. Division of Obstetrics and Gynecology Department of Maternal, Neonatal and Infant Health ASL Biella Biella Italy
2. Department of Obstetrics and Gynecology AOUI VeronaUniversity of Verona Verona Italy
3. Division of Gynecologic Oncology Department of Women and Children's Health A. Gemelli University Hospital and Institute for Research and Care Rome Italy
4. Unit of Gynecology Department of Human Pathology of Adult and Childhood “G. Barresi” University of Messina Messina Italy