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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21549017-15448804> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Sao Paulo Med J. 2004 May 6;122(3):81-6" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21549017-15448804> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/15448804> .