Concussion crisis: Hard hits make big impact – Orange County Register
Awareness of football's concussion dangers goes back 100 years
At Last, Football Faces Concussion Problems Head-On : NPR
The Harvard football teammates whose lives were upended by CTE
Tua Tagovailoa: NFL urged to make 'tangible change' to concussion
A former Harvard quarterback tackles NFL concussion woes
Dolphins deny Tua Tagovailoa played with concussion as NFL
High school football parents react to Dolphins' QB Tua concussion
Results: Concussion, Playing Experience, and Long-Term Health