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<http://linkedlifedata.com/resource/pubmed/commentcorrection/21639923-17664952> <http://linkedlifedata.com/resource/pubmed/referenceSource> "Nat Clin Pract Rheumatol. 2007 Aug;3(8):450-8; quiz, following 478" .
<http://linkedlifedata.com/resource/pubmed/commentcorrection/21639923-17664952> <http://linkedlifedata.com/resource/pubmed/referesTo> <http://linkedlifedata.com/resource/pubmed/id/17664952> .