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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21369477-9355226> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Spine (Phila Pa 1976). 1997 Oct 15;22(20):2429-34" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21369477-9355226> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/9355226> .