1. Department of General Surgery, Chang-Gung Memorial Hospital, Chang-Gung University, College of Medicine, Taoyuan, Taiwan
2. Department of Gastroenterology, Chang-Gung Memorial Hospital, Chang-Gung University, College of Medicine, Taoyuan, Taiwan
3. Department of Radiology, Chang-Gung Memorial Hospital, Chang-Gung University, College of Medicine, Taoyuan, Taiwan