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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21607173-9950974> <http://linkedlifedata.com/resource/pubmed/referenceSource> "J Am Soc Echocardiogr. 1999 Feb;12(2):149-54" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21607173-9950974> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/9950974> .