A groundbreaking new study is underway that could help football players and other athletes who may be more at risk for concussions.

University of California, San Francisco researchers are studying the brains of more than 200 living former players for signs of chronic traumatic encephalopathy, also known as CTE, a degenerative brain disease that develops after repeated head injuries.

As of now, a diagnosis can only be made postmortem.

UCSF neurologist Dr. Gil Rabinovici and his team of researchers are aiming to develop reliable diagnostic tests while exploring factors that influence who develops CTE and why.

"We've gotten there with Alzheimer's disease, so we know it's possible in Alzheimer's disease. In the last 20 years, we've developed brain scans and blood tests that can actually de

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