McWilliams, D. F., & Walsh, D. A. (2016). Factors predicting pain and early discontinuation of tumour necrosis factor-α-inhibitors in people with rheumatoid arthritis: results from the British society for rheumatology biologics register. BMC Musculoskeletal Disorders, 17(1), Article 337. https://doi.org/10.1186/s12891-016-1192-7