1. Department of General Surgery and Medical Surgical Specialties, University of Catania, 95123 Catania, Italy
2. Department of Obstetrics and Gynaecology, Azienda di Rilievo Nazionale e di Alta Specializzazione (ARNAS) Garibaldi Nesima, 95124 Catania, Italy
3. Department of Obstetrics and Gynecology, Ospedale “Santa Maria Alla Gruccia” Piazza del Volontariato 2, 52025 Montevarchi, Italy