1. Palliative Unit, Herlev-Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
2. Respiratory Research Unit, Department of Respiratory Medicine, Bispebjerg University Hospital, Copenhagen, Denmark
3. Medical Department, Herlev-Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
4. Department of Respiratory Diseases and Allergy, Aarhus University Hospital, Aarhus, Denmark
5. Department of Respiratory Medicine, Odense University Hospital, Odense, Denmark
6. Department of Respiratory Medicine, Hvidovre University Hospital, Copenhagen, Denmark
7. Department of Respiratory Diseases, Aalborg University Hospital & Clinical Institute, Aalborg University, Aalborg, Denmark