[1] Clin Ctr Vojvodina, Clin Endocrinol Diabet & Metab Disorders, Novi Sad, Serbia
[2] Univ Novi Sad, Med Fac, Novi Sad, Serbia
[3] Aristotle Univ Thessaloniki, Gen Hosp Hippokrat, Propedeut Dept Internal Med 2, Thessaloniki, Greece
[4] Aristotle Univ Thessaloniki, Gen Hosp Hippokrat, Dept Cardiol 2, Thessaloniki, Greece
[5] Democritus Univ Thrace, Univ Hosp Alexandroupolis, Diabet Ctr, Dept Internal Med 2, Alexandroupolis, Greece
[6] Univ Novi Sad, Med Fac, Clin Ctr Vojvodina, Clin Endocrinol Diabet & Metab Disorders, Novi Sad, Serbia