US Centers for Disease Control and Prevention
https://www.cdc.gov/traumaticbraininjury/
Centers for Disease Control and Prevention - US CDC
https://www.cdc.gov/headsup/resources/playbook.html
Hockey Canada
https://www.hockeycanada.ca/en-ca/hockey-programs/safety/concussions/facts-and-prevention
Brain Injury Canada
https://braininjurycanada.ca/
BC Injury Research and Prevention Unit (BCIRPU)
http://www.injuryresearch.bc.ca/quick-facts/concussion/
McGill University Health Centre
https://www.thechildren.com/departments-and-staff/departments/department-of-concussions
BC Ministry of Health
https://www2.gov.bc.ca/gov/content/health/managing-your-health/mental-health-substance-use/child-teen-mental-health
Parachute
https://parachute.ca/en/injury-topic/concussion/
National Coaching Certification Program
https://coach.ca/nccp-making-head-way-sport
Ontario Ministry of Tourism, Culture and Sport
http://www.mtc.gov.on.ca/en/sport/rowan_committee_report.shtml