[1] Philipps Univ Marburg, Dept Pulm Rehabil, German Ctr Lung Res DZL, Marburg, Germany
[2] Schoen Klin Berchtesgadener Land, Inst Pulm Rehabil Res, Schoenau, Germany
[3] Philipps Univ Marburg, Dept Pulmonol, Marburg, Germany
[4] Psychol Hsch Berlin PHB, Berlin, Germany
[5] Univ Hosp RWTH Aachen, Dept Pneumol & Intens Care Med, Aachen, Germany
[6] Philipps Univ Marburg, Dept Med Pulm & Crit Care Med, Univ Med Ctr Giessen & Marburg, DZL, Marburg, Germany
[7] Paracelsus Med Univ, Teaching Hosp, Salzburg, Austria