1. Department of Oncology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
2. Department of Infection, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
3. Department of Urology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, P.R. China
4. Department of Radiotherapy, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China