[1] Otto Wagner Hosp, Dept Resp & Crit Care Med 1, Sanatoriumstr 2, A-1140 Vienna, Austria
[2] Otto Wagner Hosp, Ludwig Boltzmann Inst COPD & Resp Epidemiol, Sanatoriumstr 2, A-1140 Vienna, Austria
[3] Sigmund Freud Univ, Med Sch, Vienna, Austria
[4] Wilhelminenspital Stadt Wien, Second Med Dept Pneumol, Vienna, Austria
[5] Otto Wagner Hosp, Dept Resp & Crit Care Med 2, Vienna, Austria
[6] Paracelsus Med Univ, Salzburger Landeskliniken, Dept Pneumol, Salzburg, Austria
[7] Otto Wagner Hosp, Dept Thorac Surg, Vienna, Austria
[8] Otto Wagner Hosp, Karl Landsteiner Inst Thorac Oncol, Vienna, Austria
[9] Wilhelminenspital Stadt Wien, Dept Radiooncol, Vienna, Austria
[10] Gen Hosp Linz, Dept Pneumol, Linz, Austria
[11] Klinikum Wels Grieskirchen, Dept Pneumol, Wels, Austria
[12] Krankenhaus Barmherzigen Schwestern Ried Innkreis, Dept Internal Med, Ried, Austria
[13] Krankenhaus Elisabethinen, Dept Pneumol, Linz, Austria
[14] Klinikum Steyr, Dept Pneumol, Steyr, Austria
[15] Krankenhaus Hietzing Rosenhugel, Dept Pneumol & Resp Dis, Vienna, Austria
[16] Landesklinikum Hochegg, Dept Pulmonol, Hochegg, Austria
[17] Landesklinikum Krems, Clin Dept Pneumol, Krems, Austria
[18] Landeskrankenhaus Hohenems, Dept Pulmonol, Hohenems, Austria
[19] Salzkammergut Klinikum Vocklabruck, Dept Pulmonol, Vocklabruck, Austria