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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21432551-15333849> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Thorax. 2004 Sep;59(9):746-51" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21432551-15333849> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/15333849> .