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Balabram D, Gobbi H.Balabram D, et al.Rev Assoc Med Bras (1992). 2006 Nov-Dec;52(6):409-12. doi: 10.1590/s0104-42302006000600020.Rev Assoc Med Bras (1992). 2006.PMID: 17242777Free article.Portuguese.
Balabram D, Araújo FB, Porto SS, Rodrigues JS, Sousa AS, Siqueira AL, Gobbi H.Balabram D, et al.Sao Paulo Med J. 2012;130(6):360-6. doi: 10.1590/s1516-31802012000600002.Sao Paulo Med J. 2012.PMID: 23338732Free PMC article.