1 Department of Urology, Kyoto Prefectural University of Medicine, 465 Kajiicho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Kyoto, 602-8566, Japan.
2 Department of Urology, Kyoto Kizukawa Hospital, Kyoto, Japan.
3 Department of Urology, Kyoto Min-Iren Chou Hospital, Kyoto, Japan.
4 Department of Urology, Kyoto Okamoto Memorial Hospital, Kyoto, Japan.
5 Department of Urology, North Medical Center, Kyoto Prefectural University of Medicine, Kyoto, Japan.
6 Department of Urology, Kyoto Prefectural University of Medicine, 465 Kajiicho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Kyoto, 602-8566, Japan. ukimura@koto.kpu-m.ac.jp.