1. Department of Digestive Diseases, Aintree University Hospitals NHS Trust, Liverpool, UK
2. Department of Vascular Surgery, Academic Surgery Unit, Institute of Cardiovascular Sciences, University of Manchester, Manchester, UK
3. Department of Postgraduate Medical Education, Education and Research Centre, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester, UK
4. Department of General Surgery, Royal Bolton Hospital NHS Foundation Trust, Bolton, UK
5. Department of Burns and Plastic Surgery, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester, UK
6. Department of General Surgery, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester, UK