1. Department of Urology, Affiliated Hospital of Chengdu University, Chengdu, Sichuan, China (mainland)
2. Central Laboratory, Affiliated Hospital of Chengdu University, Chengdu, Sichuan, China (mainland)
3. Department of Urology, University of Tübingen, Tübingen, Germany
4. Department of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, China (mainland)