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Guskiewicz KM, Bruce SL, Cantu RC, Ferrara MS, Kelly JP, McCrea M, Putukian M, McLeod TC; National Athletic Trainers' Association.Guskiewicz KM, et al. Among authors: cantu rc.Br J Sports Med. 2006 Jan;40(1):6-10. doi: 10.1136/bjsm.2005.021683.Br J Sports Med. 2006.PMID: 16371484Free PMC article.