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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21569637-18948390> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Tob Control. 2009 Feb;18(1):54-9" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21569637-18948390> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/18948390> .