1. Department of Psychiatry, Harvard Medical School, Boston, Massachusetts, USA
2. Department of Psychiatry, Massachusetts General Hospital, Boston, Massachusetts, USA
3. VA San Diego Center of Excellence for Stress and Mental Health, San Diego, California, USA
4. Department of Psychiatry, University of California San Diego, La Jolla, California, USA
5. Biostatistics Research Center, Department of Family Medicine and Public Health, University of California San Diego, La Jolla, California, USA
6. Dartmouth-Hitchcock Medical Center, Department of Psychiatry, Dartmouth Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
7. Department of Neurological Surgery, University of Louisville, Louisville, Kentucky, USA
8. Department of Surgery, Riverside University Health System, Moreno Valley, California, USA
9. Psychiatry Division, Ralph H. Johnson VA Medical Center, Charleston, South Carolina, USA
10. Department of Psychiatry and Behavioral Sciences, The Medical University of South Carolina, Charleston, South Carolina, USA
11. Department of Neurology and Neurosciences, Stanford University Medical Center, Stanford, California, USA
12. Durham VA Medical Center, Durham, North Carolina, USA
13. Department of Psychiatry and Behavioral Sciences, Duke University, Durham, North Carolina, USA
14. Department of Psychiatry, Indiana University School of Medicine, Indianapolis, Indiana, USA
15. Department of Critical Care Medicine, Neurology, and Neurosurgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
16. Department of Family Medicine and Public Health, University of California San Diego, La Jolla, California, USA
17. Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Brigham and Women’s Hospital, Massachusetts General Hospital, and Harvard Medical School, Boston, Massachusetts, USA
18. Massachusetts General Hospital for Children Sports Concussion Program, Boston, Massachusetts, USA
19. MGH Red Sox Foundation Home Base Program, Boston, Massachusetts, USA