1. Department of Surgery, College of Medicine, Taif University, Taif, Saudi Arabia.
2. Division of Colorectal Surgery, Department of Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
3. Division of Colorectal Surgery, Department of Surgery, St. Vincent Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
4. Department of Radiation Oncology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.