1. Department of Respiratory Medicine and Endocrinology, Pulmonary Section, Copenhagen University Hospital Hvidovre, Copenhagen, Denmark
2. Department of Respiratory Medicine and Infectious Diseases, Copenhagen Univervisity Hospital Bispebjerg Hospital, Copenhagen, Denmark
3. Department of Medicine, Respiratory Medicine Section, Copenhagen University Hospital Herlev Gentofte Hospital, Copenhagen, Denmark
4. Department of Clinical Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark