Brain condition CTE seen in H.S. football players: study
Too many football hits can change the brain
Parkinson's: Playing American football may increase risk by 61%
Playing football young may mean earlier cognitive, emotional problems
Striking Evidence Linking Football to Brain Disease Sparks Calls for More Research - Scientific American
New youth football study finds no link with future health problems
Football Related Brain Injuries Lead to Long-term Issues
Youth tackle football connected to permanent brain damage, early decline - Study Finds
Football players at increased risk for Parkinson's disease, study finds
Survey: Half of Americans says kids shouldn't play tackle football
High school football concussions and long-term health concerns: Research roundup