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<http://linkedlifedata.com/resource/pubmed/commentcorrection/4719534-5812703> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Am J Public Health Nations Health. 1969 Jan;59(1):60-4" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/4719534-5812703> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/5812703> .