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Cifuentes A, Valencia J, Sanz E, Sánchez MJ, Rodríguez-Delgado MA.Cifuentes A, et al.J Chromatogr A. 1997 Aug 22;778(1-2):389-96. doi: 10.1016/s0021-9673(97)00285-9.J Chromatogr A. 1997.PMID: 9299748