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Photo Gallery: 4/20 At Civic Center Park

Traumatic Brain Encephalopathy

(credit: CBS)

No Such Thing As A Rung Bell — This One Is For Parents

If you’re one of those people who believe “getting your bell rung” is a minor injury, think again. The largest study of its kind shows hits to the head add up, causing brain damage as early as the teen years. Dr. Dave Hnida has some advice for parents.

12/03/2012