1. Obstetrics and Gynecology Unit, “G. Rodolico” University Hospital of Catania, CHIRMED Department, University of Catania, 95123 Catania, Italy
2. Maternal and Child Department, Obstetrics and Gynecology, Cannizzaro Hospital, 95100 Catania, Italy
3. Maternal and Child Department, University of Enna “Kore”, 94100 Enna, Italy
4. Economics and Business Department, University of Catania, 95129 Catania, Italy
5. Obstetrics and Gynecology, “Giovanni Paolo II” Hospital, 97100 Ragusa, Italy