1. Department of Urology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
2. Department of Urology, Xiangya Hospital, Central South University, Changsha, China
3. Department of Urology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
4. Okayama Medical Innovation Center, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan