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Littlejohn G, Roberts L, Bird P, de Jager J, Griffiths H, Nicholls D, Young J, Zochling J, Tymms KE. Patients with Rheumatoid Arthritis in the Australian OPAL Cohort Show Significant Improvement in Disease Activity over 5 Years: A Multicenter Observational Study. J Rheumatol. 2015 Sep;42(9):1603–9. doi: 10.3899/jrheum.141575. PMID: 26136482. |