Lee D H1, Kim J C2, Kim H W3, Choi J B4, Kim Y H5, Park W H6, Lee K W5
1. Department of Urology, Incheon St. Mary's Hospital Hospital, The Catholic University of Korea, 2. Department of Urology, Bucheon St. Mary's Hospital, The Catholic University of Korea, 3. Department of Urology, St. Paul's Hospital, The Catholic University of Korea, 4. Department of Urology, Ajou University Hospital, 5. Department of Urology, Bucheon Soonchunhyang Hospital, Soonchunhyang University, 6. Department of Urology, Inha University Hospital