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<http://linkedlifedata.com/resource/pubmed/commentcorrection/1911601-2021560> <http://linkedlifedata.com/resource/pubmed/referenceType> "CommentOn" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/1911601-2021560> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Br J Obstet Gynaecol. 1991 Mar;98(3):241-3" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/1911601-2021560> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/2021560> .