1. Department of Urology, Tohoku University Graduate School of Medicine, Sendai, Japan
2. Department of Urology, Tohoku Medical and Pharmaceutical University, Sendai, Japan
3. Department of Urology, Tokyo Medical and Dental University, Tokyo, Japan
4. Harasanshin Hospital, Fukuoka, Japan
5. Department of Urology, Kitasato University School of Medicine, Sagamihara, Japan
6. Department of Renal and Genitourinary Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan