1. Division of Pediatric Endocrinology and Diabetology, Department of Obstetrics, Gynecology and Pediatrics, Azienda USL – IRCCS di Reggio Emilia, Reggio Emilia, Italy;
2. Center of Reproductive Medicine and Surgery, Department of Obstetrics, Gynecology and Pediatrics, Azienda USL – IRCCS di Reggio Emilia, Reggio Emilia, Italy;
3. Epidemiology Unit, Azienda USL – IRCCS di Reggio Emilia, Reggio Emilia, Italy