1. Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, MA, USA
2. Sports Concussion Program, MassGeneral Hospital for Children, Waltham, MA, USA
3. Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Charlestown, MA, USA
4. Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Massachusetts General Hospital, Brigham and Women’s Hospital, and Harvard Medical School, Boston, MA, USA
5. College of Osteopathic Medicine, University of New England, Biddeford, ME, USA
6. Department of Physical Medicine and Rehabilitation, Schoen Adams Research Institute at Spaulding Rehabilitation, Charlestown, MA, USA