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Zhang XY, Xu YJ, Liu XS, Zhang ZX.Zhang XY, et al. Among authors: zhang zx.Chin Med J (Engl). 2010 Jul;123(13):1709-14.Chin Med J (Engl). 2010.PMID: 20819634
Zhang XY, Ma LJ, Xu YJ, Liu XS, Zhang ZX.Zhang XY, et al. Among authors: zhang zx.Zhonghua Jie He He Hu Xi Za Zhi. 2011 Aug;34(8):604-8.Zhonghua Jie He He Hu Xi Za Zhi. 2011.PMID: 22168984Chinese.