[1] Univ Messina, Dept Clin & Expt Med, Messina, Italy
[2] Romagna Local Hlth Author, Ravenna Diabet Ctr, Ravenna, Italy
[3] Univ Trieste, Diabet Ctr, Dept Med Surg & Hlth Sci, ASUGI, Trieste, Italy
[4] Ctr Outcomes Res & Clin Epidemiol CORESEARCH, Pescara, Italy
[5] AMD Fdn, Reggio Emilia, Italy
[6] G Segalini H Bassini Cinisello Balsamo ASST Nord, Milan, Italy
[7] USL Tuscany Northwest Locat Livorno, Diabet & Metab Dis, Livorno, Italy