1. Department of Radiology, University of Washington, Seattle
2. Department of Neurological Surgery, University of Washington, Seattle
3. Department of Health Services, University of Washington, Seattle
4. Comparative Effectiveness, Cost, and Outcomes Research Center, University of Washington, Seattle
5. Department of Biostatistics, University of Washington, Seattle
6. Center for Biomedical Statistics, University of Washington, Seattle
7. Flatiron Health, New York, New York
8. Rehabilitation Care Services, VA Puget Sound Health Care System, Seattle, Washington
9. Department of Rehabilitation Medicine, University of Washington, Seattle
10. Department of Radiology, Mayo Clinic, Rochester, Minnesota
11. Kaiser Permanente Washington, Seattle
12. Departments of Family Medicine and Internal Medicine, Oregon Health and Science University, Portland
13. Department of Radiology, Henry Ford Hospital, Detroit, Michigan
14. Department of Radiology, Stanford University School of Medicine, Palo Alto, California
15. Division of Research, Kaiser Permanente Northern California, Oakland, California
16. Surgical Outcomes Research Center, University of Washington, Seattle
17. Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle