Department of Urology the First Affiliated Hospital of Zhengzhou University Zhengzhou 450052 China;
Department of Pathology Institute of Hematology Chinese Academy of Medical Sciences and Peking Union Medical College Tianjin 300020 China;
Department of Urology Shandong Provincial Hospital Jinan 250021 China;
Tianjin Institute of Urology Second hospital of Tianjin Medical University Tianjin 300211 China;