[1] NKUA, Sch Med, Clin Ergospirometry Exercise & Rehabil Lab, Athens, Greece
[2] Evaggelismos Gen Hosp, Immunol & Histocompatibil Dept, Athens, Greece
[3] NKUA, Aretaieion Hosp, Sch Med, Hematol Lab,Blood Bank, Athens, Greece
[4] NKUA, Sotiria Hosp, Sch Med, Intens Care Unit,Dept Resp Med 1, Athens, Greece