1 Department of Urology, The Third Hospital of Hebei Medical University, No. 139 Ziqiang Road, Shijiazhuang, 050001, Hebei, China.
2 Second Department of Urology, Cangzhou Central Hospital, No. 16, Xinhua West Road, Cangzhou, 061001, Hebei, China.
3 Department of Anesthesiology, The Third Hospital of Hebei Medical University, No. 139, Ziqiang Road, Shijiazhuang, 050001, Hebei, China.
4 Department of Urology, The Third Hospital of Hebei Medical University, No. 139 Ziqiang Road, Shijiazhuang, 050001, Hebei, China. drguoyuexian@163.com.