Affiliation: | 1. Department of Obstetrics and Gynecology, Hospital State of Republic of San Marino, San Marino, Republic of San Marino;2. Department of Obstetrics and Gynecology, University of Verona, Verona, Italy;3. Department of Obstetrics and Gynecology, IRCCS San Raffaele Scientific Institute, University Vita and Salute, Milan, Italy |