1. Department of Internal Medicine, Lillebaelt Hospital Vejle, Vejle, Denmark
2. Respiratory Research Unit PLUZ, Department of Respiratory Medicine, Zealand University Hospital Næstved & Roskilde, Næstved, Denmark
3. Institute for Regional Health Research, University of Southern Denmark, Odense, Denmark
4. Department of Internal Medicine, Gødstrup Hospital, Herning, Denmark
5. Department of Respiratory Medicine, Odense University Hospital, Odense, Denmark
6. Odense Respiratory Research Unit (ODIN), Department of Clinical Medicine, University of Southern Denmark, Odense, Denmark
7. Department of Radiology, Copenhagen University Hospital Herlev and Gentofte, Copenhagen, Denmark
8. Institute of clinical medicine, Copenhagen University, Copenhagen, Denmark
9. Department of Respiratory Medicine and Allergy, Aarhus University Hospital, Aarhus, Denmark