1. Department of Rheumatology, Dudley Group NHS Foundation Trust, Dudley, UK
2. Fourth Department of Internal Medicine, Hippokration Hospital, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
3. Liverpool Reviews and Implementation Group, University of Liverpool, Liverpool, UK
4. Department of Pain Medicine, Dudley Group NHS Foundation Trust, Dudley, UK
5. Arthritis Research UK Centre for Epidemiology, Centre for Musculoskeletal Research, University of Manchester, Manchester, UK