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Karlsson, J. et al. (2013). Addition of infliximab compared with addition of sulfasalazine and hydroxychloroquine to methotrexate in early rheumatoid arthritis: 2-year quality-of-life results of the randomised, controlled, SWEFOT trial. Annals of the rheumatic diseases. 72 (12), pp. 1927-1933. [Online].