[1] Univ Giessen & Marburg Lung Ctr UGMLC, Giessen, Germany
[2] Justus Liebig Univ, German Ctr Lung Res DZL, Inst Lung Hlth ILH, Excellence Cluster Cardiopulm Inst CPI, Giessen, Germany
[3] Med Univ Graz, Div Pulmonol, Dept Internal Med, Graz, Austria
[4] Ludwig Boltzmann Inst Lung Vasc Res, Graz, Austria
[5] Kerckhoff Heart Rheuma & Thorac Ctr, Dept Cardiol, Bad Nauheim, Germany
[6] Kerckhoff Heart Rheuma & Thorac Ctr, Dept Thorac Surg, Bad Nauheim, Germany
[7] Kerckhoff Heart Rheuma & Thorac Ctr, Dept Pneumol, Bad Nauheim, Germany
[8] Imperial Coll London, Dept Med, London, England