1. Gynecological Unit, Department of Surgical Sciences, University of Rome “Tor Vergata”, 00133 Rome, Italy
2. Department of Molecular and Developmental Medicine, Obstetrics and Gynecological Clinic, University of Siena, 53100 Siena, Italy
3. Department of Obstetrics and Gynecology, Fondazione “Policlinico-Mangiagalli-Regina Elena” University of Milan, 20122 Milan, Italy