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Weder-Cisneros N, Téllez-Zenteno JF, Velásquez-Paz A, Cantú-Brito C, Orozco A, Mimenza-Alvarado A, García-Ramos G.Weder-Cisneros N, et al.Rev Invest Clin. 2003 Nov-Dec;55(6):629-34.Rev Invest Clin. 2003.PMID: 15011731Spanish.