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Barc M, Sliwka-Kaszyńska M.Barc M, et al.J Chromatogr A. 2009 May 1;1216(18):3954-60. doi: 10.1016/j.chroma.2009.03.008. Epub 2009 Mar 13.J Chromatogr A. 2009.PMID: 19321175