1. Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, Massachusetts
2. Department of Physical Medicine and Rehabilitation, Massachusetts General Hospital, Boston
3. Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Boston, Massachusetts
4. Boston University Alzheimer’s Disease and CTE Centers, Boston University School of Medicine, Boston, Massachusetts
5. Department of Neurology, Boston University School of Medicine, Boston, Massachusetts
6. Framingham Heart Study, Boston University School of Medicine, Boston, Massachusetts
7. Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts
8. Center for Bioethics and Humanities, University of Colorado Denver Anschutz Medical Campus, Aurora
9. Division of General Internal Medicine, University of Colorado School of Medicine, Aurora
10. Public Health Institute, California Department of Public Health, Richmond
11. Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts
12. Sean M Healey & AMG Center for ALS, Department of Neurology, Massachusetts General Hospital, Boston
13. Department of Neurosurgery, Boston University School of Medicine, Boston, Massachusetts
14. Department of Neurosurgery, Emerson Hospital, Concord, Massachusetts
15. Concussion Legacy Foundation, Boston, Massachusetts
16. Department of Physical Medicine and Rehabilitation, Brigham and Women’s Hospital, Boston, Massachusetts
17. Department of Anatomy & Neurobiology, Boston University School of Medicine, Boston, Massachusetts
18. Veterans Affairs Boston Healthcare System, Department of Veterans Affairs, Boston, Massachusetts
19. Department of Veterans Affairs Medical Center, Bedford, Massachusetts
20. Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Boston, Massachusetts