[1] Univ Athens, Attikon Univ Hosp, Fac Med, Propaedeut Internal Med Clin 2, Athens, Greece
[2] Univ Athens, Attikon Univ Hosp, Fac Med, Res Unit,Oncol Unit, Athens, Greece
[3] Attikon Univ Hosp, Hellen Natl Ctr Res Prevent & Treatment Diabet Me, Athens, Greece
[4] Hippokrateion Hosp, Dept Internal Med 2, Oncol Sect, Athens, Greece
[5] Univ Athens, Laikon Gen Hosp, Dept Internal Med 1, Athens, Greece
[6] 251 Hellen Airforce Gen Hosp, Dept Med Oncol, Athens, Greece
[7] Univ Athens, Attikon Univ Hosp, Fac Med, Dept Internal Med 2, Athens, Greece
[8] Univ Athens, Attikon Univ Hosp, Fac Med, Res Inst, Athens, Greece
[9] Univ Athens, Attikon Univ Hosp, Med Sch, Dept Internal Med 2, Athens, Greece