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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21390060-9776028> <http://linkedlifedata.com/resource/pubmed/referenceSource> "J Periodontol. 1998 Sep;69(9):998-1007" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21390060-9776028> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/9776028> .