1Department of Palliative Care, Policy and Rehabilitation, Weston Education Centre, King's College London, London, United Kingdom.
2School of Nursing and Midwifery, University of Southampton, Southampton, United Kingdom
3Department of Palliative Care, King's College Hospital NHS Foundation Trust, London, United Kingdom.
4Department of Nephrology, King's College Hospital NHS Foundation Trust, London, United Kingdom.
5Department of Palliative Care, Guy's and St Thomas NHS Foundation Trust, London, United Kingdom.
6Department of Renal Medicine, East Kent Hospitals NHS Trust, Canterbury, United Kingdom.