1. Division of Pulmonology; Medical Department I; University Hospital Carl Gustav Carus; Technical University, Dresden Germany
2. Thoraxzentrum Ruhrgebiet; Department of Respiratory and Infectious Diseases; EVK Herne and Augusta-Kranken-Anstalt; Bochum Germany
3. Department of Pulmonology; Klinikum Ernst von Bergmann; Potsdam Germany
4. Department of Internal Medicine, Infectious Diseases and Pulmonary Medicine; Charité - Universitätsmedizin Berlin; Berlin Germany
5. CAPNETZ STIFTUNG; Hannover Germany
6. Department of Respiratory Medicine; Medizinische Hochschule; Hannover Germany
7. Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH); The German Center for Lung Research (DZL); Hannover Germany
8. Department of Respiratory Medicine; Maastricht University Medical Center; Maastricht The Netherlands