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Jansen EE, Gibson KM, Shigematsu Y, Jakobs C, Verhoeven NM.Jansen EE, et al.J Chromatogr B Analyt Technol Biomed Life Sci. 2006 Jan 18;830(2):196-200. doi: 10.1016/j.jchromb.2005.10.053. Epub 2005 Nov 22.J Chromatogr B Analyt Technol Biomed Life Sci. 2006.PMID: 16309980