[1] Aristotle Univ Thessaloniki, AHEPA Univ Hosp, Dept Internal Med 1, Thessaloniki 54636, Greece
[2] Aristotle Univ Thessaloniki, Fac Hlth Sci, Basic & Translat Res Unit BTRU, Special Unit Biomed Res & Educ BRESU,Sch Med, Thessaloniki 54636, Greece
[3] Natl & Kapodistrian Univ Athens, Sch Med, Dept Pathol 1, Athens 11527, Greece
[4] Natl & Kapodistrian Univ Athens, Laiko Gen Hosp, Dept Gastroenterol, Sch Med, Athens 11527, Greece
[5] Aristotle Univ Thessaloniki, AHEPA Univ Hosp, Div Endocrinol & Metab, Dept Internal Med 1,Med Sch, Thessaloniki, Greece
[6] Aristotle Univ Thessaloniki, AHEPA Univ Hosp, Med Sch, Dept Internal Med 1,Diabet Ctr, Thessaloniki 54636, Greece
[7] Univ Birmingham, Inst Metab & Syst Res IMSR, Coll Med & Dent Sci, Birmingham B15 2TT, England
[8] Laikon Gen Hosp, Dept Pulmonol, Athens 11527, Greece
[9] Natl & Kapodistrian Univ Athens, Sch Med, Pathophysiol Dept, Athens 11527, Greece