1. Medical Department III, University Hospital Großhadern, Ludwig-Maximilians-University, Munich, Germany;
2. Department of Pulmonary Rehabilitation, Philipps-University of Marburg, German Center for Lung Research (DZL), Marburg, Germany;
3. Department of Respiratory Medicine and Pulmonary Rehabilitation, Schoen Klinik Berchtesgadener Land, Schoenau am Koenigssee, Germany;
4. Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine, University Hospital, Munich, LMU, Germany;
5. Department for Oncology, Asklepios Lungenfachkliniken Muenich-Gauting, Germany;
6. Evidensia Tierärztliche Klinik für Kleintiere Norderstedt GmbH, Norderstedt, Germany