1. Division of Psychiatry, University college London, and Dementia UK
2. Research Department of Behavioural Science and Health
3. Division of Psychiatry, University College London
4. Faculty of Health and Life Sciences, De Montfort University, Leicester, and Dementia UK
5. Geller Institute of Ageing and Memory (GIAM), University of West London
6. Centre for Psychiatry and Mental Health, Wolfson Institute of Population Health, Queen Mary University of London, London, UK