1. Health Economics Unit, Institute of Applied Health Research, University of Birmingham , Birmingham, UK
2. Primary Care Centre Versus Arthritis, Faculty of Medicine, Keele University , Keele, Staffordshire, UK
3. Keele Clinical Trials Unit (CTU), Faculty of Medicine and Health Sciences, Keele University , Keele, Staffordshire, UK
4. Midlands Partnership NHS Foundation Trust, St Georges’ Hospital , Stafford, UK
5. Surgical Treatment and Rehabilitation Service (STARS) Education and Research Alliance, The University of Queensland and Metro North Health , Brisbane, Queensland, Australia