1. Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, MA, USA.
2. Mass General for Children Sports Concussion Program, Waltham, MA, USA.
3. Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Charlestown, MA, USA.
4. Concussion Research Program, Spaulding Hospital Cambridge, Cambridge, MA, USA.
5. Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden.
6. College of Osteopathic Medicine, University of New England, Biddeford, ME, USA.
7. Department of Psychiatry, UC San Diego School of Medicine, San Diego, CA, USA.
8. Department of Public Health Sciences, University of Connecticut School of Medicine, Farmington, CT, USA.
9. Department of Pediatrics, University of Connecticut School of Medicine, Farmington, CT, USA.
10. Injury Prevention Center, Connecticut Children’s Medical Center and Hartford Hospital, Hartford, CT, USA.
11. Department of Neurology, Harvard Medical School, Boston, MA, USA.
12. Department of Neurology, Massachusetts General Hospital, Boston, MA, USA.
13. Schoen Adams Research Institute at Spaulding Rehabilitation, Charlestown, MA, USA.