HealthDay News, June 25, 2013
"Concussions appear to be a common injury for teenagers, with the risk higher not only for athletes but also for kids who drink or smoke marijuana, new research indicates.
Canadian researchers found that of nearly 9,000 Ontario adolescents, 20 percent said they'd previously had a concussion, and almost 6 percent had suffered at least one in the past year." Read More
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