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<http://linkedlifedata.com/resource/pubmed/commentcorrection/20634647-17877746> <http://linkedlifedata.com/resource/pubmed/referenceSource> "J Clin Periodontol. 2007 Nov;34(11):931-7" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/20634647-17877746> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/17877746> .