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Dr. Ann McKee, a neuropathologist, has examined the brains of 202 deceased football players. A broad survey of her findings was published on Tuesday in The Journal of the American Medical Association. (Joe Ward, Josh Williams and Sam Manchester, 7/25)

In the 202 total brains belonging to men who played football on all levels, researchers found CTE in 177. Out of the 14 brains of men who only reached the high school football level, three brains were diagnosed with CTE. Forty-eight of 53 brains belonging to men who stopped playing football after the college level also were also diagnosed with CTE. (Culpepper, 7/25)

"While we still don't know what the incidence is in the general population or in the general population of football players," [Dr. Ann McKee] says, "the fact that we were able to gather this many cases [in that time frame] says this disease is much more common than we previously realized." (Goldman, 7/25)

Even those with mild CTE had suffered from disabling mental problems, including agitation, impulsivity, explosive tempers, and memory loss. More than half contemplated suicide. Suicide, in fact, was the leading cause of death among those with mild CTE. (Freyer, 7/25)