1. Division of Psychiatry, Marie Curie Palliative Care Research Department, University College London, London, UK
2. Bamford Centre for Mental Health & Wellbeing, University of Ulster, Londonderry, UK
3. Division of Psychiatry, University College London, London, UK
4. Department of Primary Care & Population Health, University College London, London, UK
5. Division of Psychiatry, Marie Curie Palliative Care Research Department, University College London, London, UK; Barnet Enfield and Haringey Mental Health Trust Liaison Psychiatry Team, North Middlesex University Hospital, London, UK