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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21229294-19639387> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Eur J Epidemiol. 2009;24(9):521-9" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21229294-19639387> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/19639387> .