1. Primary Palliative Care Research Group, Usher Institute of Population Health Sciences and Informatics, Edinburgh Medical School, The University of Edinburgh, Edinburgh, UK
2. Liver Unit, Royal Infirmary of Edinburgh, Edinburgh, UK
3. Marie Curie Hospice Edinburgh, Edinburgh, UK
4. Palliative Care Service, Royal Infirmary of Edinburgh, Edinburgh, UK
5. Division of Psychology, University of Stirling, Stirling, UK
6. Edinburgh Clinical Trials Unit, Usher Institute of Population Health Sciences and Informatics, The University of Edinburgh, Edinburgh, UK