Dr. Tom Schweizer, St. Michael's Hospital (IMAGE)
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University athletes with a history of concussion had changes in the size, blood flow and connections in their brains months and even years after the injury -- changes not seen in athletes without prior concussions, according to a new study by researchers at St. Michael's Hospital. Shown here is Dr. Tom Schweizer, co-author of the study.
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Courtesy of St. Michael's Hospital
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