Age of first exposure to football and later-life cognitive impairment in former NFL players.
Stamm JM, Bourlas AP, Baugh CM, Fritts NG, Daneshvar DH, Martin BM, McClean MD, Tripodis Y, Stern RA. Age of first exposure to football and later-life cognitive impairment in former NFL players. Neurology. 2015 Mar 17; 84(11):1114-20.