[1] Hyogo Coll Med, Dept Urol, Nishinomiya, Hyogo 6638501, Japan
[2] Kyoto Univ, Dept Pharmacoepidemiol, Grad Sch Med & Publ Hlth, Kyoto, Japan
[3] Kyoto Univ, Grad Sch Med, Dept Urol, Kyoto, Japan
[4] Tohoku Univ, Grad Sch Med, Dept Urol, Sendai, Miyagi 980, Japan
[5] Tokai Univ, Sch Med, Dept Urol, Tokyo 151, Japan
[6] Kansai Med Univ, Dept Urol & Androl, Osaka, Japan
[7] Kagawa Univ, Dept Urol, Sch Med, Takamatsu, Kagawa 760, Japan
[8] Sizuoka City Hosp, Dept Urol, Shizuoka, Japan
[9] Shiga Med Ctr Adults, Dept Urol, Moriyama, Japan
[10] Japanese Red Cross Otsu Hosp, Dept Urol, Otsu, Shiga, Japan
[11] Natl Hosp Org, Kyoto Med Ctr, Dept Urol, Kyoto, Japan
[12] Koseikai Takeda Hosp, Dept Urol, Kyoto, Japan
[13] Tenri Hosp, Dept Urol, Tenri, Nara 632, Japan
[14] Japanese Red Cross Osaka Hosp, Dept Urol, Osaka, Japan
[15] Kansai Elect Power Hosp, Dept Urol, Osaka, Japan
[16] Saiseikai Noe Hosp, Dept Urol, Osaka, Japan
[17] Kobe City Med Gen Hosp, Dept Urol, Kobe, Hyogo, Japan
[18] Nishi Kobe Med Ctr, Dept Urol, Kobe, Hyogo, Japan
[19] Chibune Gen Hosp, Dept Urol, Osaka, Japan
[20] Takarzuka City Hosp, Dept Urol, Takarzuka, Japan
[21] Kawanishi City Hosp, Dept Urol, Kawanishi, Japan
[22] Kyowakai Kyoritsu Hosp, Dept Urol, Osaka, Japan