1. Department of Clinical and Experimental Medicine, University of Messina , 98100 Messina , Italy
2. UOD Diabetes Center , ASST Cremona, 26100 Cremona , Italy
3. UOSD Endocrine, Metabolic and Nutrition Diseases, ASST Brianza, Desio Hospital , 20832 Desio , Italy
4. UOC Endocrine, Metabolic and Nutrition Diseases, Ospedale Civile di Vicenza , 36100 Vicenza , Italy
5. S.C. Diabetes and Endocrine Diseases, Cardarelli Hospital , 86100 Campobasso , Italy
6. SSVD Diabetes and Endocrine Diseases , ASL TO 3, 10024 Torino , Italy
7. Center for Outcomes Research and Clinical Epidemiology, CORESEARCH , 75100 Pescara , Italy
8. SS Diabetes and Metabolic disease, Bassini Hospital , Cinisello Balsamo, 20019 Milano , Italy
9. Fondazione AMD , 42121 Reggio Emilia , Italy
10. AUSL Diabetes Unit Romagna , 48121 Ravenna , Italy
11. Diabetes and Metabolic Diseases Unit, Health Local Unit North-West Tuscany , 57100 Livorno , Italy
12. Department of Experimental Medicine, Sapienza University of Rome , 00044 Rome , Italy
13. Israelitico Hospital , 00044 Rome , Italy
14. Cdc Santa Famiglia , 00044 Rome , Italy
15. Human Nutrition Sciences, International Medical University Unicamillus , 00044 Rome , Italy