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Zhu HJ, Wang JS, Patrick KS, Donovan JL, DeVane CL, Markowitz JS.Zhu HJ, et al.J Chromatogr B Analyt Technol Biomed Life Sci. 2007 Oct 15;858(1-2):91-5. doi: 10.1016/j.jchromb.2007.08.014. Epub 2007 Aug 19.J Chromatogr B Analyt Technol Biomed Life Sci. 2007.PMID: 17804308Free PMC article.