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<http://linkedlifedata.com/resource/pubmed/commentcorrection/11504891-1931017> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Biotechniques. 1991 Aug;11(2):188-90, 192-4, 196 passim" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/11504891-1931017> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/1931017> .