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Zheng YH, Zheng LP, Li F, Wu L, Dai YC.Zheng YH, et al.Sheng Li Xue Bao. 2008 Feb 25;60(1):97-104.Sheng Li Xue Bao. 2008.PMID: 18288364Free article.Chinese.
Zheng LP, Wang JL, Zheng YH, Wu L, Xiao QX, Li F.Zheng LP, et al.Zhongguo Ying Yong Sheng Li Xue Za Zhi. 2009 Feb;25(1):74-9.Zhongguo Ying Yong Sheng Li Xue Za Zhi. 2009.PMID: 21186621Chinese.