[1] Aristotle Univ Thessaloniki, Hippokrat Gen Hosp, Propedeut Dept Internal Med 2, Thessaloniki 54642, Greece
[2] Univ Novi Sad, Clin Ctr Vojvodina, Clin Endocrinol Diabet & Metab Disorders, Novi Sad, Serbia
[3] Univ Novi Sad, Med Fac, Novi Sad, Serbia
[4] Aristotle Univ Thessaloniki, Hippokrat Gen Hosp, Dept Cardiol 3, Thessaloniki, Greece
[5] Aristotle Univ Thessaloniki, Hippokrat Gen Hosp, Propedeut Dept Internal Med 2, Gastroenterol & Hepatol Div,Med Sch, Thessaloniki, Greece