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<http://linkedlifedata.com/resource/pubmed/commentcorrection/4420944-4239601> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Ann Thorac Surg. 1969 Jun;7(6):550-61" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/4420944-4239601> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/4239601> .