1. The Royal Marsden Hospital, London, UK
2. Pain Management Team, The Royal Marsden Hospital, London, UK
3. The Institute of Cancer Research, London, UK
4. Royal National Orthopaedic Hospital, Stanmore, UK
5. Division of Health & Social Care Research, King’s College London, London, UK
6. The Royal Marsden and Royal Brompton Palliative Care Service, The Royal Marsden NHS Foundation Trust, London, UK
7. Epidemiology & International Public Health, Bielefeld School of Public Health, Bielefeld University, Bielefeld, Germany