1. Department of Psychology, University of British Columbia , Vancouver, BC , Canada
2. Department of Physical Medicine and Rehabilitation, Harvard Medical School , Boston, MA , USA
3. Mass General for Children Sports Concussion Program , Boston, MA , USA
4. Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital , Charlestown, MA , USA
5. Department of Physical Medicine and Rehabilitation, Schoen Adams Research Institute at Spaulding Rehabilitation , Charlestown, MA , USA