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Moraes EN, Pedroso ER.Moraes EN, et al.Rev Soc Bras Med Trop. 2000 May-Jun;33(3):271-5. doi: 10.1590/s0037-86822000000300006.Rev Soc Bras Med Trop. 2000.PMID: 10967596Free article.Portuguese.