1. Department of Obstetrics and Gynecology, A.O.U.P. P. Giaccone, University of Palermo, 90127 Palermo, Italy
2. Department of Obstetrics and Gynecology, Villa Sofia Cervello Hospital, University of Palermo, 90146 Palermo, Italy
3. Department of Anatomical, Histological, Forensic and Orthopedic Sciences, Sapienza University of Rome, 00198 Rome, Italy