1. Department of Urology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
2. Department of Urology, The First People's Hospital of Yulin, Yulin, Guangxi Zhuang Autonomous Region 537000, P.R. China
3. Department of Urology, Guangxi Medical University Cancer Hospital, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China