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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21224954-11822012> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Endoscopy. 2002 Feb;34(2):160-2" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21224954-11822012> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/11822012> .