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Macedo CA, Galia CR, Rosito R, Valin MR, Kruel AV, Muller L, Rodríguez FA.Macedo CA, et al.Rev Fac Cien Med Univ Nac Cordoba. 1999;56(1):91-6.Rev Fac Cien Med Univ Nac Cordoba. 1999.PMID: 10668269Spanish.