[1] Univ Hosp Cologne, Dept Internal Med 1, Lung Canc Grp Cologne, Ctr Integrated Oncol, Cologne, Germany
[2] Univ Hosp Cologne, Inst Pathol, Cologne, Germany
[3] Lungenklin Hemer, Pneumol, Hemer, Germany
[4] Evangel Kliniken Johanniter & Waldkrankenhaus Bon, Thorac Surg, Bonn, Germany
[5] Florence Nightingale Hosp, Pneumol, Dusseldorf, Germany
[6] Hosp Bethanien, Pneumol, Solingen, Germany
[7] Malteser Hosp Bonn, Dept Internal Med, Bonn, Germany
[8] Hosp Coswig, Pneumol, Coswig, Germany
[9] Univ Hosp Cologne, Inst Pathol, Ctr Integrated Oncol, Cologne, Germany