[1] AO Papa Giovanni XXIII, Unit Endocrinol & Diabetol, Bergamo, Italy
[2] Univ Milan, Sch Med, Sect Med Stat & Biometry GA Maccacaro, Dept Occupat Hlth Clin Lavoro L Devoto, Milan, Italy
[3] San Raffaele Hosp & Sci Inst, Diabet Res Inst, Milan, Italy
[4] San Raffaele Vita Salute Univ, Milan, Italy
[5] IDIBAPS, Barcelona, Spain
[6] Ctr Invest Biomed Red Diabet & Enfermedades Metab, Barcelona, Spain
[7] Policlin Univ Gaetano Martino, Dept Clin & Expt Med, Messina, Italy
[8] Univ Bari Aldo Moro, Sect Internal Med Endocrinol Androl & Metab Dis, Dept Emergency & Organ Transplantat, Bari, Italy
[9] Univ Padua, Dept Med, Padua, Italy