1. Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, Massachusetts, USA
2. MassGeneral Hospital for Children Sports Concussion Program, Boston, Massachusetts, USA
3. Spaulding Rehabilitation Hospital, Charlestown, Massachusetts, USA
4. School of Physical and Occupational Therapy, McGill University, Montreal, Quebec, Canada
5. Spaulding Research Institute, Charlestown, Massachusetts, USA
6. Montreal Children Hospital, McGill University Health Center, Montreal, Quebec, Canada
7. Faculty of Medicine and Health Sciences, Department of Pediatrics and Pediatric Surgery, McGill University, Montreal, Quebec, Canada
8. Health Canada, Canadian Hospitals Injury Reporting & Prevention Program, Montreal, Quebec, Canada
9. Department of Pediatrics, Montreal Children’s Hospital, McGill University Health Centre, Montreal, Quebec, Canada