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Barroso WK, Jardim PC, Vitorino PV, Bittencourt A, Miquetichuc F.Barroso WK, et al. Among authors: jardim pc.Rev Assoc Med Bras (1992). 2008 Jul-Aug;54(4):328-33. doi: 10.1590/s0104-42302008000400018.Rev Assoc Med Bras (1992). 2008.PMID: 18719791Free article.Clinical Trial.Portuguese.