1. School of Medicine, Health Policy and Practice, University of East Anglia, Norwich, NR4 7TJ, UK
2. Health Services Research Unit, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, UK
3. School of Nursing and Midwifery, University of Southampton, Highfield, Southampton, SO17 1BJ, UK
4. Department of Information Studies, University of Sheffield, Regent Court, 211 Portobello Street, Sheffield, S1 4DP, UK
5. Centre for Cancer and Palliative Care Studies, Institute of Cancer Research, Royal Marsden Hospital, London, SW3 6JJ, UK
6. Sheffield Palliative Care Studies Group, Trent Palliative Care Centre, Little Common Lane, Sheffield, S11 9NE, UK