1. Red Cell Pain Management & Psychology Service, St George’s University Hospitals NHS Foundation Trust, London, UK
2. Population Health Research Institute, St George’s University of London, London, UK
3. Clinical Research Unit, South West London & St George’s Mental Health Trust, Springfield University Hospital, London, UK
4. Health Psychology Section, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
5. INPUT Pain Management Unit, Guy’s and St Thomas’ NHS Foundation Trust, London, UK
6. Physiotherapy Department, St George’s University Hospitals NHS Foundation Trust, London, UK