1. Department of Obstetrics and Gynecology, “Tor Vergata” University, Rome, Italy
2. Department of Obstetrics and Gynecology, “Sandro Pertini” Hospital, Rome, Italy
3. Department of Surgery-Week Surgery, “Campus Biomedico” University, Rome, Italy
4. Department of Obstetrics and Gynecology, “Casilino” Hospital, Rome, Italy