Wan, Li, Department of Urology, Pangang Group General Hospital, Sichuan, 617023, China Wang, Shubin, Department of Urology, Pangang Group General Hospital, Sichuan, 617023, China Wang, Yong, Department of Urology, Pangang Group General Hospital, Sichuan, 617023, China Wei, Xupan, Department of Urology, Pangang Group General Hospital, Sichuan, 617023, China