1. Department of Urology, Hanyang University College of Medicine, Seoul, Korea.
2. Department of Urology, Myongji Hospital, College of Medicine, Kwandong University, Goyang, Korea.
3. Department of Urology, The Catholic University of Korea College of Medicine, Seoul, Korea.
4. Department of Urology, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Korea.
5. Department of Urology, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea.
6. Department of Urology, Eulji University College of Medicine, Daejeon, Korea.
7. Department of Urology, College of Medicine, Dong-A University College of Medicine, Busan, Korea.