1. Division of Urology, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Kaohsiung, Taiwan, Republic of China
2. College of Medicine, Chang Gung University, Taoyuan, Taiwan, Republic of China
3. Graduate Institution of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan, Republic of China
4. Department of Medical Research, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan, Republic of China
5. Department of Urology, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan, Republic of China