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Butterfield TA, Zhao Y, Agarwal S, Haq F, Best TM.Butterfield TA, et al. Among authors: zhao y.Med Sci Sports Exerc. 2008 Jul;40(7):1289-96. doi: 10.1249/MSS.0b013e31816c4e12.Med Sci Sports Exerc. 2008.PMID: 18580410Free PMC article.
Haas C, Best TM, Wang Q, Butterfield TA, Zhao Y.Haas C, et al. Among authors: zhao y.J Biomech. 2012 Oct 11;45(15):2630-6. doi: 10.1016/j.jbiomech.2012.08.008. Epub 2012 Aug 31.J Biomech. 2012.PMID: 22944344Free PMC article.
Zhao Y, Zeng H, Nam J, Agarwal S.Zhao Y, et al.Biotechnol Bioeng. 2009 Feb 1;102(2):624-31. doi: 10.1002/bit.22080.Biotechnol Bioeng. 2009.PMID: 18958861Free PMC article.