1. Department of Surgery, Faculty of Medicine, Al Baha University, Al Baha, Saudi Arabia
2. Hepatology, Gastroenterology and Hepatobiliary/Transplant Unit, Jordan Hospital, Amman, Jordan
3. Department of General and Transplant Surgery, Jordan Hospital, Amman, Jordan
4. Department of General, Visceral and Pediatric Surgery, University Medical Center Göttingen, Göttingen, Germany