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Valença AM, Nardi AE, Mezzasalma MA, Nascimento I, Zin WA, Lopes FL, Versiani M.Valença AM, et al. Among authors: lopes fl.Sao Paulo Med J. 2003 Mar 5;121(2):77-80. doi: 10.1590/s1516-31802003000200009. Epub 2003 Jul 14.Sao Paulo Med J. 2003.PMID: 12870055Free article.Clinical Trial.