CNN's Sanjay Gupta interviews Dr. Betsy Nabel, the NFL's first medical adviser.
NFL Chief Health and Medical Adviser on concussions
Dr. Elizabeth Nabel, the NFL's first Chief Health and Medical Adviser, sits down with CNN's Dr. Sanjay Gupta to discuss the concussion crisis in football
02:36 - Source: CNN
Concussions in football 12 videos
CNN's Sanjay Gupta interviews Dr. Betsy Nabel, the NFL's first medical adviser.
NFL Chief Health and Medical Adviser on concussions
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