1. Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
2. Department of Urology, The First Affiliated Hospital of Henan University of TCM, Zhengzhou, Henan 450052, P.R. China
3. Department of Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China