1. School of Physical and Occupational Therapy; Faculty of Medicine; McGill University; Montreal Quebec Canada
2. Trauma Center; The Montreal Children's Hospital; McGill University Health Center; Montreal Quebec Canada
3. Department of Pediatrics; Faculty of Medicine; McGill University; Montreal Quebec Canada
4. Canadian Hospitals Injury Reporting and Prevention Program; Montreal Quebec Canada
5. Department of Physical Medicine and Rehabilitation; Harvard Medical School; Boston Massachusetts USA
6. Spaulding Rehabilitation Hospital; Boston Massachusetts USA
7. Mass General Hospital for Children Sports Concussion Program; Boston Massachusetts USA
8. Red Sox Foundation and Massachusetts General Hospital Home Base Program; Boston Massachusetts USA