1. Departments of Urology, Miyazaki Prefectural Miyazaki Hospital, Miyazaki, Japan
2. Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
3. University of Tsukuba, Ibaraki, Japan
4. Faculty of Medicine, Kagawa University, Kagawa, Japan
5. Niigata Cancer Center Hospital, Niigata, Japan
6. Urology Division, National Cancer Center Hospital, Tokyo, Japan
7. Nagoya University Graduate School of Medicine, Nagoya, Japan
8. Sapporo Medical University School of Medicine, Sapporo, Japan
9. Kyoto University, Kyoto, Japan
10. Hirosaki University Graduate School of Medicine, Hirosaki, Japan
11. Harasanshin Hospital, Fukuoka, Japan
12. Graduate School of Medicine, Yamaguchi University, Ube, Japan
13. Graduate School of Medicine, Chiba University, Chiba, Japan
14. Japan Clinical Oncology Group Data Center, Operations Office, National Cancer Center, Tokyo, Japan