1. Research Fellow in the Department of Physiology, St Mark's Hospital, Harrow HA1 3UJ
2. Surgical Trainee in the Department of Surgery, Sandwell and West Birmingham Hospitals NHS Trust, City Hospital, Birmingham
3. Surgical Registrar in the Department of Surgery, Heart of England NHS Foundation Trust, Birmingham
4. Consultant Upper Gastrointestinal Surgeon in the Department of Surgery, Heart of England NHS Foundation Trust, Birmingham