1. Department of Clinical Pharmacology and Epidemiology, Consorzio Mario Negri Sud, S. Maria Imbaro (CH), Italy
2. A.S. Diabetes and Metabolic Diseases, AUSL 4, Prato, Italy
3. Diabetes Unit, A.O. Spedali Civili Brescia, Italy
4. Diabetes Unit, Cadore Hospital, Dolomiti-Belluno, Italy
5. Diabetes and Metabolism Unit, Chieri (TO), Italy
6. Diabetes Unit, “Madonna del Soccorso” Hospital, San Benedetto del Tronto (AP), Italy