1. Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway,
2. Clinic of Oncology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway,
3. Department of Pulmonology, Haukeland University Hospital, Bergen, Norway,
4. Department of Oncology, Oslo University Hospital, The Norwegian Radium Hospital, Oslo, Norway,
5. Institute of Clinical Medicine, University of Oslo, Oslo, Norway,
6. Department of Pulmonology, University Hospital of North Norway, Tromsø, Norway,
7. Department of Clinical Medicine, Faculty of Medicine, University of Tromsø, Tromsø, Norway,
8. Department of Oncology, University Hospital of North Norway, Tromsø, Norway,
9. Department of Pulmonology, Nordland Hospital, Bodø, Norway,
10. Department of Oncology, Oslo University Hospital, Ullevål Hospital, Oslo, Norway,
11. Department of Oncology, Ålesund Hospital, Ålesund, Norway, and
12. Department of Pulmonology, Ålesund Hospital, Ålesund, Norway.