1. General Surgery Department, KasrAlAiny School of Medicine, Cairo University, Cairo, Egypt.
2. Internal Medicine Department, KasrAlAiny School of Medicine, Cairo University, Cairo, Egypt.
3. General Surgery Department, National Hepatology and Tropical Medicine Research Institute, Cairo, Egypt.
4. General Surgery Department, Great Western Hospital, NHS Foundation Trust, Swindon, United Kingdom.
5. National Hepatology and Tropical Medicine Research Institute, Gastroenterology and Hepatology Department, Cairo, Egypt.
6. General Surgery Department, Saudi German Hospital, Jeddah, Saudi Arabia.
7. General Surgery Department, Glangwill General Hospital, Carmarthen, Wales.
8. General Surgery Department, United Lincolnshire NHS Trust, Lincoln, United Kingdom.
9. General Surgery Department, Royal Free London Hospital, NHS, London, United Kingdom.
10. General Surgery Department, University Hospitals Dorset NHS Foundation Trust, Poole, United Kingdom.
11. Division of Cancer Sciences, Salford Royal Hospital, University of Manchester, Manchester, United Kingdom.