1. Department of Clinical and Experimental Medicine; University of Pisa; Pisa Italy
2. Department of Endocrinology and Metabolism; University of Pisa; Pisa Italy
3. Division of Endocrinology and Metabolic Diseases; University of Verona; Verona Italy
4. Diabetes Unit; University of Siena; Siena Italy
5. Endocrinology and Diabetes Unit; Fondazione IRCCS “Cà Granda-Ospedale Maggiore Policlinico”; Milan Italy
6. Diabetes Unit; A.O. Ospedali Riuniti; Bergamo Italy
7. Department of Clinical and Experimental Medicine; University of Padua; Padua Italy
8. Unit of Internal Medicine; University of Turin; Turin Italy
9. Unit of Endocrinology and Metabolic Diseases; University of Foggia; Foggia Italy
10. Department of Internal Medicine and Medical Specialties; “La Sapienza” University, Rome; Rome Italy
11. Department of Clinical and Molecular Medicine; “La Sapienza” University, Rome; Rome Italy