van der Leeden, M., Dahmen, R., Ursum, J., Roorda, L. D., van Schaardenburg, D., Knol, D. L., Dekker, J., & Steultjens, M. P. (2010). Prediction of walking disability by disease-related factors in patients with rheumatoid arthritis. Journal of Rehabilitation Medicine, 42(5), 506–510. https://doi.org/10.2340/16501977-0551