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Baur L, Sänger-van de Griend C, Wätzig H.Baur L, et al.J Chromatogr A. 2002 Dec 6;979(1-2):97-103. doi: 10.1016/s0021-9673(02)01406-1.J Chromatogr A. 2002.PMID: 12498237