1. Diabetes Research Institute, San Raffaele Hospital and Scientific Institute, Milan, Italy
2. San Raffaele Vita-Salute University, Milan, Italy
3. Institut d'Investigacions Biomèdiques August Pi Sunyer and Centro de Investigacion Biomedica en Red de Diabetes y Enfermedades Metabolicas Asociadis, Barcelona, Spain
4. Department of Internal Medicine, Policlinico Universitario Gaetano Martino, Messina, Italy
5. Department of Clinical and Experimental Medicine, Division of Metabolic Diseases, University of Padova, Padova, Italy
6. Medical Affairs, Roche Diagnostics, Monza, Italy
7. Department of Occupational Health Clinica del Lavoro L. Devoto, Section of Medical Statistics and Biometry G.A. Maccacaro, School of Medicine, University of Milan, Milan, Italy
8. Department of Emergency and Organ Transplantation, Section of Internal Medicine, Endocrinology, Andrology, and Metabolic Diseases, University of Bari School of Medicine, Bari, Italy.