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Fujii N, Kaji Y, Fujii N.Fujii N, et al.J Chromatogr B Analyt Technol Biomed Life Sci. 2011 Nov 1;879(29):3141-7. doi: 10.1016/j.jchromb.2011.05.051. Epub 2011 Jun 12.J Chromatogr B Analyt Technol Biomed Life Sci. 2011.PMID: 21723211