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Anaya-Velázquez F, Padilla-Vaca F, Barrios-Rodiles M, Vaca-Chávez A, González-Robles A.Anaya-Velázquez F, et al.Arch Med Res. 1997;28 Spec No:195-6.Arch Med Res. 1997.PMID: 9033069No abstract available.