1. Department of General Surgery and Medical-Surgical Specialties, Institute of Obstetrics and Gynecology, A.O.U. Policlinico Rodolico, San Marco, University of Catania, 95125 Catania, Italy
2. Department of Woman and Child Health and Public Health, Catholic University of the Sacred Heart, 00168 Rome, Italy
3. Department of Neuroscience, Reproductive Sciences and Dentistry, School of Medicine, University of Naples Federico II, 80131 Naples, Italy
4. Department of Public Health, University of Naples Federico II, 80131 Naples, Italy
5. Unit of Gynecology and Obstetrics, Department of Human Pathology of Adult and Childhood “G. Barresi”, University of Messina, 98121 Messina, Italy