Russell Gage's injury highlights the NFL's concussion problem and
How football raises the risk for chronic traumatic encephalopathy
CTE In Athletes Linked To Hits To The Head, Even Without
Fencing Response' Signals a Serious Head Injury, Experts Say
New Study Finds Brain Damage in Living Ex-NFL Players
NFL's head injury problems may be diagnosed, treated earlier
Ex-NFL players six times more likely than the general public to
The link between head injuries and CTE in football, explained - Vox
Head Injuries & American Football - Ethics Unwrapped
How Different Are Dogfighting and Football?
How the Sports World Learned to Ignore CTE - Global Sport Matters
Concussion List Tracker for NFL Players, plus NFL Concussion
The quest to detect CTE in the living and what it means for
5 NFL players who were sent into retirement by concussions
Study links longer football careers to more severe cases of CTE