Godfrey, E., Sekhon, M., Hendry, G., Foster, N. E., Hider, S., van der Leeden, M., Mason, H., McConnachie, A., McInnes, I., Patience, A., Sackley, C., Steultjens, M., Williams, A., Woodburn, J., & Bearne, L. P221 Treatment fidelity in the Gait Rehabilitation in Early Rheumatoid Arthritis Trial (GREAT) feasibility study