The link between head injuries and CTE in football, explained - Vox

Untangling the Link Between Head Injuries and CTE

Breakthrough in CTE research - Chicago Sun-Times

How the NFL Changed Public Awareness of Mental Health – Ruderman Family Foundation

What Happens When Soccer Bans Heading? - The Ringer

The NFL and Concussions: The Overlooked Obvious - Bolts From The Blue

Does Soccer Have a Brain-Trauma Problem?

NFL's new quarterback specific helmet design – United Brain Association

US health body officially acknowledges link between collision sports and CTE in historic ruling

Buckley: Would players keep playing if they knew they had CTE? – Boston Herald