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<http://linkedlifedata.com/resource/pubmed/commentcorrection/15502677-2226745> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Fam Plann Perspect. 1990 Jul-Aug;22(4):150-7, 168" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/15502677-2226745> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/2226745> .