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Date: 2012-01-05 03:00:00Concussion Second-impact syndrome Head injury Sports medicine Symptom Concussion grading systems Health issues in American football Neurotrauma Medicine Health | 2009 NFHS Concussion Brochure:Head Trauma Brochure V2.qxd.qxdAdd to Reading ListSource URL: biacolorado.orgDownload Document from Source WebsiteFile Size: 98,99 KBShare Document on Facebook |