1. Laboratory of Respiratory Diseases, Department of Chronic Diseases, Metabolism and Ageing
2. Department of Respiratory Diseases and
3. Department of Pneumology, Centre Hospitalier Universitaire Saint-Pierre, Université Libre de Bruxelles, Brussels, Belgium
4. Department of Pneumology, Jessa Ziekenhuis, Hasselt, Belgium
5. Department of Respiratory Medicine, AZ Delta Roeselare-Menen, Roeselare, Belgium
6. Department of Pneumology, Centre Hospitalier Universitaire, Liège, Belgium
7. Department of Pneumology, CHU-UCL-Namur, Yvoir, Belgium
8. Faculty of Medicine, NARILIS, Laboratory of Respiratory Physiology, University of Namur, Namur, Belgium
9. Department of Respiratory Medicine, ZNA Middelheim, Antwerpen, Belgium
10. Department of Pneumology, AZ Sint-Jan, Brugge-Oostende, Belgium
11. Department of Pneumology, AZ Groeninge, Kortrijk, Belgium
12. Department of Pneumology, UZ Brussel, Jette, Belgium
13. Department of Pneumology, Onze-Lieve-Vrouw Ziekenhuis, Aalst, Belgium
14. Department of Pneumology, Centre Hospitalier Universitaire de Charleroi, Charleroi, Belgium
15. Department of Pneumology, Grand Hôpital de Charleroi, Charleroi, Belgium
16. Department of Pneumology, Imelda Ziekenhuis, Bonheiden, Belgium
17. Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium; and
18. Department of Cardiology, University Hospitals Leuven, Leuven, Belgium
19. I-BioStat, and
20. Universiteit Hasselt, Hasselt, Belgium
21. Department of Rehabilitation Sciences, Faculty of Kinesiology and Rehabilitation Sciences, KU Leuven, Leuven, Belgium