http://abclocal.go.com/kfsn/story?section=news/sports/pro/football&sa=NFL&eid=7888497
ABC
was brain trauma a factor in seau death

<p style="margin-left:20px"><a href="https://www.harvardmagazine.com/2010/01/xenith-football-helmet-counters-concussions " target="_blank"> <img src="https://harvardmagazine.com/sites/default/files/HM_forWebRedesign_final.png" alt="View related Harvard Magazine article" title="View related Harvard Magazine article">Read more on this topic in <span style="font-style:italic; font-weight:600;">Harvard Magazine</span></a></p>