[1] Natl & Kapodistrian Univ Athens, Resp Med Dept 1, Athens Chest Hosp Sotiria, Sch Med, Athens, Greece
[2] Athens Chest Hosp Sotiria, Resp Med Dept 7, Athens, Greece
[3] Natl & Kapodistrian Univ Athens, Gen Univ Hosp Attikon, Sch Med, Pulm Med Dept 2, Athens, Greece
[4] Democritus Univ Thrace, Dept Resp Med, Univ Gen Hosp, Sch Med, Komotini, Greece
[5] Natl & Kapodistrian Univ Athens, Gen Univ Hosp Attikon, Sch Med, Dept Cardiol 2, Athens, Greece
[6] Ygeia Hosp, Dept Cardiol 6, Heart Failure & Prevent Cardiol Sect, Athens, Greece
[7] Elena Venizelou Hosp, Dept Diabet Endocrinol & Metab, Athens, Greece