1. Department of Respiratory Medicine, Respiratory Research Unit PLUZ, Zealand University Hospital Naestved, Naestved, Denmark
2. Department of Regional Health Research, University of Southern Denmark, Odense, Denmark
3. Department of Medicine, Naestved, Slagelse and Ringsted Hospitals, Næstved, Denmark
4. Centre of General Practice, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
5. Hospice Arresoedal, Frederiksvaerk, Denmark
6. The Primary Health Care Research Unit, Region Zealand, Denmark