1 Pediatrics, University of Manitoba, Winnipeg, MB, Canada.
2 Section of Neurosurgery, University of Manitoba, Winnipeg, MB, Canada.
3 Pan Am Concussion Program, University of Manitoba, Winnipeg, MB, Canada.
4 Children's Hospital Research Institute of Manitoba, Winnipeg, MB, Canada.
5 Department of Clinical Health Psychology, University of Manitoba, Winnipeg, MB, Canada.
6 Division of Neurosurgery, British Columbia Children's Hospital, National Core for Neuroethics, University of British Columbia, Vancouver, BC, Canada.