1. NIHR Horizon Scanning Centre, Department of Public Health, Epidemiology and Biostatistics, University of Birmingham, Birmingham, UK,
2. Department of Family Medicine, University of Calgary, Calgary, Alberta, Canada and
3. Arthritis Research UK Primary Care Centre, Research Institute for Primary Care & Health Sciences and
4. Health Services Research Unit, Institute of Science and Technology in Medicine, Keele University, Stoke-on-Trent, UK.