1. Department of Cardiothoracic Surgery RT Rigshospitalet, University of Copenhagen, Copenhagen, Denmark;
2. Department of Oncology, Finsen Centre/Rigshospitalet Copenhagen, Copenhagen, Denmark;
3. Department of Pulmonary Medicine, Gentofte University Hospital, Hellerup, Denmark;
4. Department of Pulmonary Medicine, Haukeland universitetssjukehus, Bergen, Norway;
5. Section of Oncology, Drammen Hospital, Vestre Viken Hospital Trust, Drammen, Norway;
6. Department of Radiology, Akershus University Hospital, Loerenskog, Norway;
7. Registry Department, Cancer Registry of Norway, Oslo, Norway;
8. Karolinska University Hospital, Karolinska Institute, Stockholm, Sweden;
9. Department of Respiratory Medicine, Gävle Hospital, Gävle, Sweden;
10. Department of Heart and Lung Diseases, Skåne University Hospital, Sweden;
11. Department of Thoraxradiology, Karolinska University Hospital, Stockholm, Sweden;
12. Department of Cardiothoracic Surgery, Karolinska University Hospital, Stockholm, Sweden;
13. Vaasa Oncology Clinic, Turku University, Turku, Finland;
14. Helsinki University, Helsinki University Hospital, Heart and Lung Centre, Helsinki, Finland;
15. Department of Cardiothoracic Surgery, Faculty of Medicine, Landspitli University Hospital, University of Iceland, Reykjavik, Iceland