1. Department of Surgery, NYU Langone Health Long Island, New York, USA
2. Harvard T. H. Chan School of Public Health, Harvard University, Cambridge, Massachusetts, USA
3. King Edward Medical University, Lahore, Pakistan
4. Section of Gastroenterology and Hepatology, Department of Medicine, West Virginia University, Morgantown, West Virginia, USA
5. National Guard Hospital, King Abdulaziz Medical City, Riyadh, Saudi Arabia