1. Marie Curie Palliative Care Research Department, Division of Psychiatry, University College London, London, UK
2. Department of Psychiatry, Faculty of Medicine, Prince of Songkla University, Hat Yai, Thailand
3. Centre for Ageing Population Studies, Research Department of Primary Care and Population Health, University College London, London, UK
4. Language and Cognition, Division of Psychology and Language Sciences, University College London, London, UK
5. National Ageing Research Institute, Parkville, Victoria, Australia
6. NIHR Policy Research Unit in Health & Social Care Workforce and NIHR Applied Research Collaborative (ARC) South London, King's College London, London, UK
7. Barnet Enfield and Haringey Mental Health Trust Liaison Team, North Middlesex University Hospital, Sterling Way, London, UK