For the most comprehensive information on concussions on the Internet, click here.
Links:
[1] https://mail.momsteam.com/node/305
[2] https://mail.momsteam.com/pcss/teens-with-multiple-concussion-history-much-more-likely-report-continuing-symptoms
[3] https://mail.momsteam.com/health-safety/concussion-safety/multiple-concussion-history-important-factor-in-concussion-management
[4] https://mail.momsteam.com/health-safety/quitting-contact-collision-sport-after-concussion-tough-family-not-just-athlete