1. Unit of Endocrinology and Metabolic Diseases, University of Campania “Luigi Vanvitelli”, Naples, Italy
2. Department of Advanced Medical and Surgical Sciences, University of Campania “Luigi Vanvitelli”, Naples, Italy
3. University of Campania “Luigi Vanvitelli”, Naples, Italy
4. Unit of Diabetes, University of Campania “Luigi Vanvitelli”, Naples, Italy