1. Division of Urology, Department of Surgery, Lotung Poh-Ai Hospital, Yilan County, Taiwan
2. Division of Urology, Department of Surgery, LinKou Chang Gung Memorial Hospital, Taoyuan, Taiwan
3. Division of Urology, Department of Surgery, KeeLung Chang Gung Memorial Hospital, Keelung, Taiwan
4. Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan