Bucknall, M., Chew-Graham, C., Babatunde, O., Corp, N., & Hider, S. (2020). The association between anxiety and disease activity and quality of life in rheumatoid arthritis: a systematic review and meta-analysis. Clinical rheumatology, 39, 1471–1482. https://doi.org/10.1007/s10067-019-04900-y