[1] Natl & Kapodistrian Univ Athens, Attikon Univ Hosp, Res Inst & Diabet Ctr,Endocrine Unit, Propaedeut Dept Internal Med 2, Athens 12461, Greece
[2] Sotiria Gen Hosp, Dept Internal Med 3, Athens 11527, Greece
[3] Natl & Kapodistrian Univ Athens, Alexandra Hosp, Diabet Ctr,Endocrine Unit, Sch Med,Dept Clin Therapeut, Athens 11528, Greece
[4] Aristotle Univ Thessaloniki, Hippokrate Hosp, Dept Internal Med 2, Hematol Lab, Thessaloniki 54640, Greece
[5] Natl & Kapodistrian Univ Athens, Attikon Univ Hosp, Sch Med, Dept Surg 3, Athens 12461, Greece
[6] Natl & Kapodistrian Univ Athens, Attikon Univ Hosp, Sch Med, Dept Obstet & Gynecol, Athens 12461, Greece