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Elizalde-González MP, Mattusch J, Wennrich R.Elizalde-González MP, et al. Among authors: wennrich r.J Chromatogr A. 1998 Dec 18;828(1-2):439-44. doi: 10.1016/s0021-9673(98)00702-x.J Chromatogr A. 1998.PMID: 9916323