[1] Yamaguchi Univ, Grad Sch Med, Ube, Yamaguchi, Japan
[2] Yamaguchi Univ, Ube, Yamaguchi, Japan
[3] Kokura Mem Hosp, Dept Urol, Kitakyushu, Japan
[4] Tokuyama Cent Hosp, Dept Urol & Nephrol, Shunan, Japan
[5] Saiseikai Yamaguchi Gen Hosp, Dept Urol, Yamaguchi, Japan
[6] Yamaguchi Grand Med Ctr, Dept Urol, Hofu, Japan
[7] Shimonoseki Saisekai Toyoura Hosp, Dept Urol, Shimonoseki, Yamaguchi, Japan
[8] Nagato Gen Hosp, Dept Urol, Nagato, Japan
[9] Shuto Gen Hosp, Yanai, Japan
[10] Saiseikai Shimonoseki Gen Hosp, Dept Urol, Shimonoseki, Yamaguchi, Japan
[11] Masuda Red Cross Hosp, Dept Urol, Masuda, Japan
[12] Shimonoseki City Hosp, Dept Urol, Shimonoseki, Yamaguchi, Japan
[13] Yamaguchi Red Cross Hosp, Dept Urol, Yamaguchi, Japan
[14] Ogori Daiichi Gen Hosp, Yamaguchi, Japan
[15] Sanyo Onoda Municipal Hosp, Sanyo Onoda, Japan