1. Department of Internal 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, Department of Internal Medicine, Endocrine and Metabolic Sciences and Biochemistry, University of Siena, Siena, Italy
5. Endocrinology and Diabetes Unit, Department of Medical Sciences, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico, “Cà Granda–Ospedale Maggiore Policlinico,” San Giuseppe Hospital, Milan, Italy
6. Endocrinology Unit, San Giuseppe Hospital, Milan, Italy
7. Diabetes Unit, Hospital of Bergamo, A.O. Ospedali Riuniti, Bergamo, Italy
8. Department of Clinical and Experimental Medicine, University of Padua, Padua, Italy
9. Unit of Endocrinology and Metabolic Diseases, Department of Medical Sciences, University of Foggia, Foggia, Italy
10. Department of Experimental and Clinical Medicine, “Magna Graecia” University, Catanzaro, Italy
11. Department of Clinical Pharmacology and Epidemiology, Consorzio Mario Negri Sud, S. Maria Imbaro, Chieti, Italy
12. Department of Clinical and Molecular Medicine, “La Sapienza” University, Rome, Italy