1. Marie Curie Hospice Edinburgh, Edinburgh, UK
2. Clinical Psychology, University of Edinburgh, Edinburgh, UK
3. Marie Curie Hospice Glasgow, Glasgow, UK
4. Edinburgh Delirium Research Group, Ageing and Health, Usher Institute, University of Edinburgh, Royal Infirmary of Edinburgh, Edinburgh, UK
5. Department of Computing, School of Computing, Engineering and Built Environment, Glasgow Caledonian University, Scotland, UK