1. Unit of Gynecology and Obstetrics, Department of Human Pathology of Adult and Childhood “G. Barresi”, University of Messina, 98122 Messina, Italy
2. Department of Woman, Child and General and Specialized Surgery, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy
3. Department of General Surgery and Medical Surgical Specialties, University of Catania, 95124 Catania, Italy
4. Department of Obstetrics and Gynecology, University of Parma, 43125 Parma, Italy
5. Clinic of Obstetrics and Gynecology, “Santa Maria della Misericordia” University Hospital, Azienda Sanitaria Universitaria Friuli Centrale, 33100 Udine, Italy
6. Department of Medicine, University of Udine, 33100 Udine, Italy