[1] Univ Athens, Sch Med, Hosp Dis Chest Sotiria, Acad Dept Pneumonol 1, Athens, Greece
[2] Hosp Dis Chest Sotiria, Dept Resp Med 5, Athens, Greece
[3] Yale Sch Med, Dept Internal Med, Sect Pulm Crit Care & Sleep Med, New Haven, CT USA
[4] Biomed Sci Res Ctr Alexander Fleming, Div Immunol, Athens, Greece