1 Department of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, China; West China School of Medicine, Sichuan University, Chengdu, Sichuan, China.
2 Department of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, China. Electronic address: qiushu@scu.edu.cn.
3 Department of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, China. Electronic address: weiqiang933@126.com.