1. Department of Urology, Kyoto University, Kyoto, Japan
2. Department of Urology, Shiga University of Medical Science, Shiga, Japan
3. Department of Urology, Nara Medical University, Kashihara, Japan
4. Department of Urology, Aichi Children's Health and Medical Center, Aichi, Japan
5. Division of Clinical Trial Design and Management, Translational Research Center, Kyoto University Hospital, Kyoto, Japan