Muller, S., Hider, S., Machin, A., Stack, R., Hayward, R. A., Raza, K., & Mallen, C. (2019). Searching for a prodrome for rheumatoid arthritis in the primary care record: A case-control study in the clinical practice research datalink. Seminars in Arthritis and Rheumatism, 48(5), 815-820. https://doi.org/10.1016/j.semarthrit.2018.06.008