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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21541067-18207723> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Int J Drug Policy. 2008 Apr;19(2):130-9" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21541067-18207723> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/18207723> .