| Affiliation: | 1. Trent Oesophago‐Gastric Unit, Nottingham City Hospital Campus, Nottingham University Hospitals NHS Trust, Nottingham, UK;2. NELA Research Fellow, Royal College of Anaesthetists, London, UK;3. Clinical Effectiveness Unit, Royal College of Surgeons of England, London, UK;4. Department of Health Services Research and Policy, London School of Hygiene and Tropical Medicine, London, UK;5. Department of Surgery, Royal Lancaster Infirmary, University Hospitals of Morecambe Bay NHS Foundation Trust, Lancaster, UK;6. Colorectal Surgery Department, Salford Royal Hospitals NHS Trust, Salford, UK |
