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Millard-Stafford M, Childers WL, Conger SA, Kampfer AJ, Rahnert JA.Millard-Stafford M, et al.Curr Sports Med Rep. 2008 Jul-Aug;7(4):193-201. doi: 10.1249/JSR.0b013e31817fc0fd.Curr Sports Med Rep. 2008.PMID: 18607220Review.