1. Department of Medicine, Kings College , London , UK
2. Department of Surgery and Networked Services, Portsmouth Hospitals University NHS Trust, Portsmouth , UK
3. Faculty of Science and Health, University of Portsmouth, Portsmouth , UK
4. Academic Surgical Unit, Imperial College London, London , UK
5. Department of General Surgery, North Cumbria Integrated Care NHS Foundation Trust, Carlisle , UK
6. Concentric Health , Cardiff , UK