1. Department of Obstetrics and Gynecology, ASST Vimercate, Carate, Italy
2. Department of Obstetrics and Gynecology, FMBBM Foundation, University of Milano-Bicocca, Monza, Italy
3. Department of Obstetrics and Gynecology, University of Milano-Bicocca, ASST Vimercate, Carate, Italy