Sports-related concussions not proved to cause later brain disease, says expert group, Science

Football Player Had 'Worst' Brain Trauma Seen in Someone So Young, Doctor Says

Concussions: Are High School Sports Worth the Risk?

NFL Board Paid $2M to Players While League Denied Football-Concussion Link

New BU Study Finds Tackle Football at Young Age Raises Risk for Brain Decline Later, The Brink

Three or more concussions linked with worse brain function in later life

Bennet Omalu, Concussions, and the NFL: How One Doctor Changed Football Forever

What a lifetime of playing football can do to the human brain McKelvey School of Engineering at Washington University in St. Louis

Brain scans may reveal concussion damage in living athletes

Book: How one flawed study launched a wave of CTE hysteria

Repeated Head Hits, Not Just Concussions, May Lead To A Type Of Chronic Brain Damage