[1] Kyungpook Natl Univ, Sch Med, Dept Urol, Daegu, South Korea
[2] Chungbuk Natl Univ Hosp, Dept Publ Hlth & Prevent Med, Cheongju, South Korea
[3] Inje Univ, Busan Paik Hosp, Dept Urol, Busan, South Korea
[4] Korea Univ, Ansan Hosp, Dept Urol, Coll Med, Ansan, South Korea
[5] Soonchunhyang Univ, Dept Urol, Seoul Hosp, Seoul, South Korea
[6] Chonnam Natl Univ, Med Sch, Dept Urol, Gwangju, South Korea
[7] Natl Police Hosp, Dept Urol, Seoul, South Korea
[8] Konyang Univ, Dept Urol, Coll Med, Daejeon, South Korea
[9] Yonsei Univ, Dept Urol, Wonju Coll Med, Wonju, South Korea
[10] Catholic Univ Korea, Coll Med, Bucheon St Marys Hosp, Dept Urol, Seoul, South Korea
[11] Catholic Univ Korea, Coll Med, Dept Urol, Seoul St Marys Hosp, Seoul, South Korea
[12] Dongguk Univ, Dept Urol, Sch Med, Gyeongju, South Korea
[13] Chungbuk Natl Univ, Chungbuk Natl Univ Hosp, Dept Urol, Coll Med, 776 1Sunhwan Ro, Cheongju 28644, South Korea
[14] Chungbuk Natl Univ, Grad Sch Hlth Sci Business Convergence, Coll Med, Inst Urotech, Cheongju, South Korea
[15] Chungbuk Natl Univ, Grad Sch Hlth Sci Business Convergence, Coll Med, Dept Prevent Med, 52 Naesudong Ro, Cheongju 28644, South Korea