1. Population Health Research Institute, St George’s, University of London, London, UK
2. Pragmatic Clinical Trials Unit, Queen Mary University of London, London, UK
3. Gerontology and Health Services Research Unit, Brunel University London, London, UK
4. Research Department of Primary Care and Population Health, University College London, London, UK
5. Health Economics Research Group, Brunel University London, London, UK
6. Department of Sports Medicine, Norwegian School of Sport Sciences, Oslo, Norway
7. Medical Research Council Epidemiology Unit, University of Cambridge, Cambridge, UK
8. 10 Minute CBT, Devonshire Business Centre, Letchworth Garden City, UK