1. Academic Unit of Elderly Care and Rehabilitation, Leeds Institute of Health Science, University of Leeds, Leeds, UK
2. Academic Unit of Elderly Care and Rehabilitation, Bradford Institute for Health Research, Bradford Teaching Hospitals NHS Foundation Trust, Bradford, UK
3. Clinical Trials Research Unit, Leeds Institute of Clinical Trials Research, University of Leeds, Leeds, UK
4. Rehabilitation Medicine, Leeds Institute of Rheumatic and Musculoskeletal Medicine, Leeds General Infirmary, Leeds, UK
5. Academic Unit of Psychiatry and Behavioural Sciences, Leeds Institute of Health Sciences, University of Leeds, Leeds, UK
6. Centre for the Economics of Mental and Physical Health, King’s College London, London, UK
7. Personal Social Services Research Unit, London School of Economics & Political Science, London, UK