1. Junior Seau, famed N.F.L. linebacker, dies at 43; suicide is suspected;G. Bishop;The New York Times,2012
2. Expert ties ex-player’s suicide to brain damage;A. Schwartz;New York Times,2007
3. The effects of rest and treatment following sport-related concussion: a systematic review of the literature.;KJ Schneider;Br J Sports Med,2013
4. Farrey T. ESPN poll: most parents have concerns about the state of youth sports. [Internet]. ESPN. 2014. Available from: http://www.espn.com/espnw/w-in-action/article/11675649/parents-concern-grows-kids-participation-sports