1 Department of Urology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, 100730, China.
2 Department of Urology, Zhongshan City People's Hospital, Zhongshan City, Guangdong Province, 528400, China.
3 Department of Urology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, 100730, China. Electronic address: yanwg11@126.com.