1. Carr A, Hewlett S, Hughes R, Mitchell H, Ryan S, Carr M, et al. Rheumatology outcomes: the patient’s perspective. J Rheumatol. 2003;30:880–3.
2. Kirwan J, Heiberg T, Hewlett S, Hughes R, Kvien T, Ahlmen M, et al. Outcomes from the patient perspective workship at OMERACT 8. J Rheumatol. 2003;30:868–72.
3. Kirwan JR, Minnock P, Adebajo A, Bresnihan B, Choy E, de Wit M, et al. Patient perspective: fatigue as a recommended patient centered outcome measure in rheumatoid arthritis. J Rheumatol. 2007;34(5):1174–7.
4. Hewlett S, Chalder T, Choy E, Cramp F, Davis B, Dures E, et al. Fatigue in rheumatoid arthritis: time for a conceptual model. Rheumatology. 2011;50:1004–6.
5. Overman C, Kool M, Da Silva J, Geenen R. The prevalence of severe fatigue in rheumatic disease: an international study. Clin Rheumatol. 2016;35:409–15.