1. Department of Physical Medicine and Rehabilitation, Harvard Medical School; Boston, Massachusetts, USA; Massachusetts General Hospital; Boston, Massachusetts, USA; Spaulding Rehabilitation Hospital, Boston, Massachusetts, USA.
2. Chronic Traumatic Encephalopathy Center, Boston University School of Medicine, Boston, Massachusetts, USA.
3. Center for Bioethics and Humanities, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado, USA; Division of General Internal Medicine, University of Colorado School of Medicine, Aurora, Colorado, USA.
4. School of Engineering, Stanford University, Stanford, California, USA.
5. Department of Neurology, Stanford School of Medicine, Palo Alto, California, USA.
6. Graduate School of Education, Stanford University, Stanford, California, USA.
7. Department of Neurosurgery, Stanford School of Medicine, Palo Alto, California, USA.
8. Cantu Concussion Center, Emerson Hospital, Concord, Massachusetts, USA.
9. Department of Pediatrics, Stanford School of Medicine, Palo Alto, California, USA.
10. Brigham and Women's Hospital, Boston, Massachusetts, USA.
11. Indiana University School of Medicine, Indianapolis, Indiana, USA; New York University Langone Medical Center, New York, New York, USA.
12. Stanford Center for Innovation in Global Health, Stanford School of Medicine, Palo Alto, California, USA.