[1] Justus Liebig Univ Giessen, Univ Giessen & Marburg Lung Ctr, German Ctr Lung Res, Dept Internal Med, Giessen, Germany
[2] emka Med GmbH, Aschaffenburg, Germany
[3] Justus Liebig Univ Giessen, Univ Giessen & Marburg Lung Ctr, Dept Internal Med, Klinikstr 33, D-35392 Giessen, Germany
[4] German Ctr Lung Res, Klinikstr 33, D-35392 Giessen, Germany