chronic traumatic encephalopathy (cte), a degenerative brain disease, has been linked by medical researchers to the sort of hits football players endure..

nbc encouraged him to take whatever time he needed, but olczyk promised his bosses he'd be back full-time by the., and bones, and it�s not clear how the drugs will affect them after long-term use..

stephen silberstein, md, director, jefferson university headache center.