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Ding L, Zhang XX, Chang WB, Lin W, Yang M.Ding L, et al. Among authors: zhang xx.J Chromatogr B Analyt Technol Biomed Life Sci. 2005 Jan 5;814(1):99-104. doi: 10.1016/j.jchromb.2004.10.002.J Chromatogr B Analyt Technol Biomed Life Sci. 2005.PMID: 15607713
Zhao M, Liu Y, Li Y, Zhang X, Chang W.Zhao M, et al.J Chromatogr B Analyt Technol Biomed Life Sci. 2003 Jan 15;783(2):401-10. doi: 10.1016/s1570-0232(02)00702-x.J Chromatogr B Analyt Technol Biomed Life Sci. 2003.PMID: 12482483
Su P, Zhang XX, Chang WB.Su P, et al. Among authors: zhang xx.J Chromatogr B Analyt Technol Biomed Life Sci. 2005 Feb 25;816(1-2):7-14. doi: 10.1016/j.jchromb.2004.07.009.J Chromatogr B Analyt Technol Biomed Life Sci. 2005.PMID: 15664327