Researchers find a protein called tau in the brains of living retired NFL players . Its pattern is identical to that found in chronic traumatic encephalopathy cases . PET scan is the only method that we know of that can measure tau protein in living people , '' said Small . CTE can only be diagnosed after death . Comment:
Researchers find a protein called tau in the brains of living retired NFL players . Its pattern is identical to that found in chronic traumatic encephalopathy cases . CTE can only be diagnosed after death . Comment: