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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21217947-9484161> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Oper Dent. 1997 Mar-Apr;22(2):50-6" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21217947-9484161> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/9484161> .