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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21569577-15294023> <http://linkedlifedata.com/resource/pubmed/referenceSource> "BMC Public Health. 2004 Aug 4;4:32" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21569577-15294023> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/15294023> .