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<http://linkedlifedata.com/resource/pubmed/commentcorrection/2993370-1125147> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Br J Obstet Gynaecol. 1975 Feb;82(2):81-99" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/2993370-1125147> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/1125147> .