1. Department of Urology, Seoul National University College of Medicine, Seoul, Korea.
2. Department of Urology, Inha University College of Medicine, Seongnam, Korea.
3. Department of Urology, Keimyung University School of Medicine, Daegu, Korea.
4. Department of Urology, Sungkyunkwan University School of Medicine, Seoul, Korea.
5. Department of Urology, Korea University College of Medicine, Seoul, Korea.
6. Department of Urology, College of Medicine, Pusan National University, Busan, Korea.
7. Department of Urology, Gachon Medical School, Incheon, Korea.
8. Department of Urology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.