1. Department of Urology, Jingzhou Central Hospital, The Second Clinical Medical College, Yangtze University, Jingzhou, Hubei 434020, P.R. China
2. Key Laboratory for Oral Biomedicine of Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430071, P.R. China
3. Department of Urology, Center for Medical Science Research, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China