[1
]
Second Clinical Medical College, Lanzhou University, Lanzhou, China; Department of
Urology, Lanzhou University Second Hospital, Lanzhou, China.
[2
]
Second Clinical Medical College, Lanzhou University, Lanzhou, China.
[3
]
Second Clinical Medical College, Lanzhou University, Lanzhou, China; Department of
Urology, Lanzhou University Second Hospital, Lanzhou, China. Electronic address: dzl1997.student@sina.com.