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Zamin I Jr, Mattos AA, Mattos AZ, Migon E, Soares E, Perry ML.Zamin I Jr, et al. Among authors: mattos aa, mattos az.Arq Gastroenterol. 2009 Jan-Mar;46(1):69-74. doi: 10.1590/s0004-28032009000100017.Arq Gastroenterol. 2009.PMID: 19466313Free article.Portuguese.