1. Division of Colorectal Surgery Department of General Surgery King Saud Medical City Riyadh Saudia Arabia
2. Division of Colorectal Surgery Department of Surgery Hansol Hospital Seoul South Korea
3. Division of Colorectal Surgery Department of Surgery Incheon St. Mary's Hospital College of Medicine The Catholic University of Korea Seoul South Korea
4. Division of Colorectal Surgery Department of Surgery Ain Hospital Seoul South Korea
5. Division of Colorectal Surgery Department of Surgery Seoul St. Mary's Hospital College of Medicine The Catholic University of Korea Seoul South Korea