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Ribeiro CS, Azevedo RC, Silva VF, Botega NJ.Ribeiro CS, et al. Among authors: botega nj.Sao Paulo Med J. 2007 Sep 6;125(5):270-4. doi: 10.1590/s1516-31802007000500004.Sao Paulo Med J. 2007.PMID: 18094893Free PMC article.