[1] Univ Gen Hosp Heraklion, Dept Med Oncol, Iraklion 71110, Crete, Greece
[2] Agios Savas Anticanc Hosp, Dept Med Oncol 1, Athens, Greece
[3] Sismanoglio Gen Hosp, Dept Pulm Dis 1, Athens, Greece
[4] Sismanoglio Gen Hosp, Dept Pulm Dis 2, Athens, Greece
[5] Univ Athens, Sotiria Gen Hosp, Dept Internal Med 3, Athens, Greece
[6] Univ Athens, Sotiria Gen Hosp, Dept Pulm Dis 1, Athens, Greece
[7] Univ Athens, Sotiria Gen Hosp, Dept Pulm Dis 3, Athens, Greece
[8] Univ Athens, Sotiria Gen Hosp, Dept Pulm Dis 6, Athens, Greece
[9] Univ Athens, Sotiria Gen Hosp, Dept Pulm Dis 7, Athens, Greece
[10] Univ Athens, Sotiria Gen Hosp, Dept Pulm Dis 8, Athens, Greece
[11] Univ Athens, Sotiria Gen Hosp, Med Oncol Unit, Athens, Greece
[12] Papanicolaou Gen Hosp, Dept Pulm Dis 2, Thessaloniki, Greece
[13] Univ Athens, Laiko Gen Hosp, Med Oncol Unit, Dept Propedeut Med, Athens, Greece