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Khalifa S, Ahmed S, Mesbah M, Youssef D, Hamann M.Khalifa S, et al.J Chromatogr B Analyt Technol Biomed Life Sci. 2006 Feb 17;832(1):47-51. doi: 10.1016/j.jchromb.2005.12.028. Epub 2006 Jan 18.J Chromatogr B Analyt Technol Biomed Life Sci. 2006.PMID: 16431167
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