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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21572631-12205421> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Spine (Phila Pa 1976). 2002 Aug 15;27(16 Suppl 1):S50-8" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21572631-12205421> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/12205421> .