1. Unit of Endocrinology, IRCCS “Casa Sollievo della Sofferenza,” San Giovanni Rotondo, Italy;
2. Clinical Research Center for Rare Diseases “Aldo & Cele Daccò,” Mario Negri Institute for Pharmacological Research, Bergamo, Italy;
3. Research Unit of Diabetes and Endocrine Diseases, IRCCS “Casa Sollievo della Sofferenza,” San Giovanni Rotondo, Italy;
4. IRCCS “Casa Sollievo della Sofferenza,” Mendel Institute, Rome, Italy;
5. Unit of Biostatistics, IRCCS “Casa Sollievo della Sofferenza,” San Giovanni Rotondo, Italy;
6. Unit of Diabetology, Azienda Ospedaliera Ospedali Riuniti di Bergamo, Bergamo, Italy;
7. Unit of Diabetology, Treviglio Hospital, Treviglio, Italy;
8. Unit of Nephrology, Azienda Ospedaliera Ospedali Riuniti di Bergamo, Bergamo, Italy;
9. Department of Medical Pathophysiology, “Sapienza” University, Rome, Italy.