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<http://linkedlifedata.com/resource/pubmed/commentcorrection/19783341-17681725> <http://linkedlifedata.com/resource/pubmed/referenceSource> "J Am Soc Echocardiogr. 2008 Apr;21(4):321-6" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/19783341-17681725> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/17681725> .