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