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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21499568-3550557> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Ophthalmic Surg. 1987 Jan;18(1):23-7" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21499568-3550557> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/3550557> .