A potential biomarker, or warning sign, for a devastating brain disease caused by repeated concussions (CTE), suspected to be highly prevalent among football players, has been identified in living people for the first time by researchers.

See the source article by following the link below:
A potential biomarker, or warning sign, for a devastating brain disease caused by repeated concussions (CTE), suspected to be highly prevalent among football players, has been identified in living people for the first time by researchers.