1. Department of Cardiothoracic and Vascular Surgery, Aarhus University Hospital, Skejby, Denmark;
2. Department of Respiratory Diseases, Aalborg University Hospital, Aalborg, Denmark;
3. Solljungahälsan Health Center (General Practice), Örkelljunga, Sweden;
4. Department of Urology, Örebro University Hospital, Örebro, Sweden;
5. Respiratory Research Center, Aalborg University Hospital, Aalborg, Denmark;
6. The Clinical Institute, Aalborg University, Aalborg, Denmark