Results of a global, patient-based survey assessing the impact of psoriatic arthritis discussed in the context of the Psoriatic Arthritis Impact of Disease (PsAID) questionnaire by L. C. Coates, A.-M. Orbai, V. F. Azevedo, J. C. Cappelleri, K. Steinberg, R. Lippe, I. Lim, L. Eder, P. Richette, M. Y. Weng, R. Queiro Silva, L. Fallon

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