1. Centre of Applied Dementia Research, Faculty of Health Studies, University of Bradford, Bradford, West Yorkshire, UK;
2. REACH: The Centre for Research in Ageing and Cognitive Health, University of Exeter, St Luke’s Campus, Exeter, UK;
3. Wales Institute for Social and Economic Research, Data and Methods, Cardiff University, Cardiff, UK;
4. Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK