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Ref: Effectiveness and Feasibility Associated with Switching to a Second or Third TNF Inhibitor in Patients with Psoriatic Arthritis: A Cohort Study from Southern Sweden. Kristensen LE, Lie E, Jacobsson LT, Christensen R, Mease PJ, Bliddal H, Geborek P. J Rheumatol. 2015 Dec 1. pii: jrheum.150744. [Epub ahead of print]