Cramp, F., Walsh, N. E., Haase, A. M., Withall, J., Haase, A., Walsh, N., …Cramp, F. (. (2016). Physical activity engagement in early rheumatoid arthritis: a qualitative study to inform intervention development. Physiotherapy, 102(3), 264-271. https://doi.org/10.1016/j.physio.2015.07.002