Muller, S., Hider, S., Machin, A., Stack, R., Hayward, R., Raza, K., & Mallen, C. (2018). 315 Searching for a prodrome for rheumatoid arthritis in the primary care record: a clinical practice research datalink study. Rheumatology, 57(suppl_3), https://doi.org/10.1093/rheumatology/key075.539