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Herráez-Hernández R, Soriano-Vega E, Campíns-Falcó P.Herráez-Hernández R, et al.J Chromatogr B Biomed Appl. 1994 Aug 19;658(2):303-10. doi: 10.1016/0378-4347(94)00241-x.J Chromatogr B Biomed Appl. 1994.PMID: 7820258