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Paffer AT, Ferreira Hda S, Cabral Júnior CR, Miranda CT.Paffer AT, et al. Among authors: ferreira hda s.Sao Paulo Med J. 2012;130(2):84-91. doi: 10.1590/s1516-31802012000200003.Sao Paulo Med J. 2012.PMID: 22481753Free PMC article.