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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21437222-19075280> <http://linkedlifedata.com/resource/pubmed/referenceSource> "J Clin Oncol. 2009 Feb 1;27(4):491-7" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21437222-19075280> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/19075280> .