1. School of Medicine, College of Medicine, Chang Gung University, Taoyuan, Taiwan
2. Division of General Surgery, Department of Surgery, Linkou Medical Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
3. Department of Pathology, Chang Gung Memorial Hospital, Linkou Branch, Chang Gung University College of Medicine, Taoyuan, Taiwan
4. Division of Hematology-Oncology, Department of Internal Medicine, Chang Gung Memorial Hospital at Linkou, Chang Gung University College of Medicine, Taoyuan, Taiwan