[1] Aristotle Univ Thessaloniki, G Papanikolaou Gen Hosp, Dept Pulm, Oncol Unit, GR-54006 Thessaloniki, Greece
[2] II Mil Univ Hosp, Shanghai Hosp, Dept Resp Dis, Shanghai, Peoples R China
[3] Univ Athens, Sotiria Hosp Chest Dis, Dept Oncol, Athens, Greece
[4] Thegeneio Canc Hosp, Dept Internal Med, Thessaloniki, Greece
[5] Univ Wuerzburg,Coburg,Germany, Dept Med 2, Coburg Reg Clin, Coburg, Germany
[6] Natl Univ Athens, Sch Med, Dept Clin Therapeut, Div Pneumonol, Athens, Greece
[7] Univ Duisburg Essen, Univ Hosp Essen, West German Canc Ctr, Ruhrlandklin, Essen, Germany
[8] Univ Duisburg Essen, Univ Hosp Essen, Inst Pathol, Essen, Germany
[9] Theagenio Anticanc Hosp, Dept Internal Med, Thessaloniki, Greece