[1] Natl & Kapodistrian Univ Athens, Sotiria Chest Hosp, Resp Med Dept 1, Athens, Greece
[2] Natl & Kapodistrian Univ Athens, Sotiria Chest Dis Hosp, Med Sch, Dept Cardiol 3, Athens, Greece
[3] Med Univ Vienna, Dept Internal medicine2, Div Pulmonol, Vienna, Austria
[4] Pulmonologist, Trikala, Greece