1. Arthritis Research UK Primary Care Centre, Research Institute for Primary Care & Health Sciences, Keele University, Keele, Staffordshire, UK, and Moss Lane Surgery, Moss Lane; Madeley Crewe UK
2. Institute of Health & Society, Newcastle University; Newcastle upon Tyne UK
3. Arthritis Research UK Primary Care Centre, Research Institute for Primary Care & Health Sciences, Keele University; Keele Staffordshire UK
4. Northeastern University; Boston Massachusetts
5. La Trobe University; Melbourne Australia