Urology Department, Peking University 3rd Hospital, Beijing 100191, China;
Department of Urology, Peking University People's Hospital, Beijing 100044, China;
Department of Urology, Peking University People's Hospital, Beijing 100044, China;
Departrnent of Male Clinic Research, National Research Institute for Family Planning, Beijing 100081, China;
Urology Department, Peking University 3rd Hospital, Beijing 100191, China;
Department of Urology, Peking University People's Hospital, Beijing 100044, China;
Department of Urology, Peking University People's Hospital, Beijing 100044, China;