1. King’s College London, Cicely Saunders Institute, Department of Palliative Care, Policy and Rehabilitation, London, UK
2. King’s College London, School of Medicine, London, UK
3. King’s College London, Cicely Saunders Institute, Department of Palliative Care, Policy and Rehabilitation, London, UK; Institute for Palliative Care, Oldenburg, Germany; Centre for Palliative Medicine, University of Cologne, Germany