1. Research Center for Reproductive Medicine, Gynecological Endocrinology and Menopause, IRCCS S. Matteo Foundation, Pavia, Italy
2. Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy
3. Unit of Obstetrics and Gynecology, IRCCS S. Matteo Foundation, Pavia, Italy