Jämsen, Esa, et al. “The Decline in Joint Replacement Surgery in Rheumatoid Arthritis Is Associated With a Concomitant Increase in the Intensity of Anti-Rheumatic Therapy”. Acta Orthopaedica, vol. 84, no. 4, Aug. 2013, pp. 331-7, doi:10.3109/17453674.2013.810519.