1. Florence Nightingale Faculty of Nursing, Midwifery & Palliative Care, Cicely Saunders Institute of Palliative Care, King's College London, London, UK
2. Brighton General Hospital, Sussex Community NHS Foundation Trust, Brighton, UK
3. Centre for Primary Care, Wolfson Institute of Population Health, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
4. Centre for Ageing Population Studies, Research Department of Primary Care and Population Health, University College London, London, UK