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Bengtsson M, Laurell T.Bengtsson M, et al. Among authors: laurell t.Anal Bioanal Chem. 2004 Apr;378(7):1716-21. doi: 10.1007/s00216-003-2334-y. Epub 2003 Dec 20.Anal Bioanal Chem. 2004.PMID: 14689151