1. Department of Urology; Hallym University Kangnam Sacred Heart Hospital; Hallym University School of Medicine; Seoul Korea
2. Department of Urology; Samsung Medical Center; Sungkyunkwan University School of Medicine; Seoul Korea
3. Department of Urology; Seoul National University Hospital; Seoul National University of Medicine; Seoul Korea
4. Department of Urology; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
5. Department of Urology; National Cancer Center; Goyang Korea
6. Department of Urology; Seoul National University Bundang Hospital; Seongnam Korea
7. Department of Urology; College of Medicine; The Catholic University of Korea; Seoul Korea