In February 2011, two-time Super Bowl champion, four-time Pro Bowler and NFL Man of the Year recipient Dave Duerson died of a self-inflicted gunshot wound to the chest.Notes left behind requested that his brain be examined posthumously at the Boston University “NFL Brain Bank.” Subsequent neuropathological examination in Boston revealed that Duerson was suffering from chronic traumatic encephalopathy (CTE), an insidious brain condition found in athletes subjected to repetitive head trauma.Duerson’s CTE …