1. Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy
2. Research Centre for Reproductive Medicine, Gynecological Endocrinology and Menopause, IRCCS San Matteo Foundation, University of Pavia, Pavia, Italy
3. Department of Surgical Sciences, Obstetrics and Gynecology I, Ospedale S. Anna, University of Turin, Turin, Italy