| http://www.w3.org/ns/prov#value | - Players should only be returned to play after their concussion symptoms resolved and after they are able to do sports specific drills and be asymptomatic with exertion.Rferrand: Can a mouth guard help prevent a concussion?Daniel_Grobman_DO: Mouth-guards have been shown to reduce the risk of maxillofacial injuries and can reduce the risk, but no piece of equipment, including helmets, have been show
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