1. Department of General and Emergency Surgery, Northwick Park Hospital, London North West University Healthcare NHS Trust, London, UK
2. Department of Thoracic Surgery, Norfolk and Norwich University Hospital, Norwich, UK
3. Department of Colorectal Surgery, Derriford Hospital, University Hospital Plymouth, Plymouth, UK
4. Department of Acute and Emergency Medicine, Frimley Park Hospital, Frimley, UK
5. Division of General and GI Surgery, Harvard Medical School, Brigham and Women’s Hospital, Boston, Massachusetts, USA
6. Laboratory for Surgical and Metabolic Research, Department of Surgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
7. Department of General Surgery, Ain Shams University Hospital, Cairo, Egypt