1. Department of Orthopedic Surgery, Ålesund Hospital, Møre and Romsdal Hospital Trust, Ålesund, Norway
2. Kysthospitalet in Hagevik, Orthopedic Clinic, Haukeland University Hospital, Bergen, Norway
3. Department of Clinical Medicine, University of Bergen, Bergen, Norway
4. Hofseth BioCare, Ålesund, Norway
5. Division of Orthopedic Surgery, Oslo University Hospital Ullevål, Oslo, Norway
6. Communication and Research Unit for Musculoskeletal Health (FORMI), Oslo University Hospital, Oslo, Norway
7. Department of Research and Innovation, Møre and Romsdal Hospital Trust, Ålesund, Norway
8. Department of Registration, Cancer Registry Norway, Oslo, Norway
9. Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway
10. Department of Diagnostic Imaging, Akershus University Hospital, Oslo, Norway
11. Institute of Clinical Medicine, University of Oslo, Oslo, Norway
12. Unilabs Radiology, Oslo, Norway
13. Department of Physical Medicine and Rehabilitation, Oslo University Hospital, Oslo, Norway
14. Department of Orthopedics, Stavanger University Hospital, Stavanger, Norway
15. Department of Neurosurgery, Stavanger University Hospital, Stavanger, Norway
16. Department of Quality and Health Technology, University of Stavanger, Stavanger, Norway
17. Department of Neurosurgery and the Norwegian Registry for Spine Surgery, University Hospital of Northern Norway, Tromsø, Norway
18. Institute of Clinical Medicine, The Arctic University of Norway, Tromsø, Norway
19. Department of Surgery, Gjøvik Hospital, Innlandet Hospital Trust, Brumunddal, Norway
20. Institute of Health and Society Studies, University of Oslo, Oslo, Norway
21. Department of Orthopedics, Akershus University Hospital, Oslo, Norway
22. Department of Orthopedics, Sahlgrenska University Hospital, Gothenburg, Sweden
23. Department of Orthopedics, Institute for Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden