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<http://linkedlifedata.com/resource/pubmed/commentcorrection/2387505-4702850> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Gastrointest Endosc. 1973 Feb;19(3):131-3" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/2387505-4702850> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/4702850> .