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Knight A, Weiss P, Morales K, Gerdes M, Gutstein A, Vickery M, Keren R.Knight A, et al.Pediatr Rheumatol Online J. 2014 Sep 10;12:42. doi: 10.1186/1546-0096-12-42. eCollection 2014.Pediatr Rheumatol Online J. 2014.PMID: 25242900Free PMC article.