Zhongbao Zhou1,2, Zhenli Gao3, Jitao Wu3, Yuanshan Cui3,4. 1. School of Clinical Medicine, Binzhou Medical University, No. 346 Guanhai Road, Laishan District, Yantai, 264000, Shandong, China. 346894383@qq.com. 2. Department of Urology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, No. 20 East Yuhuangding Road, Yantai, 264000, Shandong, China. 346894383@qq.com. 3. Department of Urology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, No. 20 East Yuhuangding Road, Yantai, 264000, Shandong, China. 4. Department of Urology, Beijing Tian Tan Hospital, Capital Medical University, No. 119 South 4th Ring West Road, Fengtai District, Beijing, 100070, China.