1. Centre for Pain, Health and Lifestyle, New South Wales, Australia
2. School of Public Health, University of Sydney, Sydney, Australia
3. Arthritis Research UK Primary Care Centre, Institute for Primary Care and Health Sciences, Keele University, Keele, Staffordshire, UK
4. South Staffordshire and Shropshire NHS Foundation Trust, St George’s Hospital, Stafford, Staffordshire, UK
5. Hunter New England Population Health, Hunter New England Local Health District, Wallsend, Australia
6. School of Medicine and Public Health, Hunter Medical Research Institute, University of Newcastle, Australia