STUDY: 95.6 percent of deceased NFL players tested positive for CTE - CBSSports.com

Research conducted on almost 100 deceased NFL players revealed that over 95 percent of them tested positive for the degenerative brain disease known as chronic traumatic encephalopathy (CTE).

In a study published by Frontline on Friday, a total of 87 out of 91 players were found to have the disease. The CTE research was carried out by the Department of Veterans Affairs and Boston University.

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