NFL: Concussion issue a major headache for NFL – The Mercury
Latest CTE findings just another blow to NFL's dubious history with head injuries – New York Daily News
Duerson's family files wrongful death suit against NFL
5 NFL Athletes Who Had CTE
NFL concussion lawsuit settlement approved
NFL player Phillip Adams had same 'severe' CTE when he killed six people in April
Kansas City Chiefs player who committed 2012 murder-suicide had signs of brain disease
Duerson's Son Sues N.F.L. Over Handling of Concussions - The New York Times
Haunted by husband's death, widow takes CTE fight to Super Bowl