1. Department of Medical Sciences; Scientific Institute “Casa Sollievo della Sofferenza”; San Giovanni Rotondo (FG) Italy
2. Università degli Studi and IRCCS Azienda Ospedaliera Universitaria San Martino-IST; Genoa Italy
3. Department of Medicine; University of Padova; Padua Italy
4. Diabetes and Metabolism Unit; Chieri (TO) Italy
5. Institut d'Investigacions Biomèdiques August Pii Sunyer (IDIBAPS) and Centro de Investigación Biomédicaen Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM); Barcelona Spain
6. U.O. Diabetologia e Malattie Metaboliche, Multimedica IRCCS; Milan Italy
7. Department of Clinical and Experimental Medicine; University of Messina; Messina Italy
8. Associazione Medici Diabetologi; Rome Italy