1. King's College London, Institute of Psychiatry, London, UK
2. KHP Centre for Neurodegeneration Research, King's College London, Institute of Psychiatry, London, UK
3. King's MND Care and Research Centre, King's College London, London, UK
4. King's College Hospital NHS Foundation Trust, Cicely Saunders Institute, London, UK
5. Wisdom Hospice, Rochester, and the Centre for Professional Practice, University of Kent, Chatham, UK
6. KHP Centre for Neurodegeneration Research, King's College London, Institute of Psychiatry, and Department of Clinical Neuroscience, King's College London, Institute of Psychiatry, London, UK
7. LH Goldstein (corresponding author): Department of Psychology, King's College London, Institute of Psychiatry, Box PO77, Henry Wellcome Building, De Crespigny Park, Denmark Hill, London SE5 8AF UK;