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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21205323-15605008> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Gastrointest Endosc. 2004 Dec;60(6):927-36" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21205323-15605008> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/15605008> .