1. Marie Curie Palliative Care Research Department, Division of Psychiatry, University College London (UCL), London, UK
2. St Christopher’s Hospice, Sydenham, UK
3. Department of Statistical Science, University College London (UCL), London, UK
4. Division of Psychiatry, University College London (UCL), London, UK
5. The Bamford Centre for Mental Health and Well Being, University of Ulster, Londonderry, UK
6. Department of Primary Care and Population Health, University College London (UCL), London, UK
7. Barnet Enfield and Haringey Mental Health Trust Liaison Psychiatry Team, North Middlesex University Hospital, London, UK