1 Department of Pathology, The Third Affiliated Hospital of Gansu University of Traditional Chinese Medicine, Baiyin 730900, China.
2 Department of Urology, The Third Affiliated Hospital of Gansu University of Traditional Chinese Medicine, Baiyin 730900, China.
3 Department of Urology, The Third Affiliated Hospital of Gansu University of Traditional Chinese Medicine, Baiyin 730900; Department of General Surgery, The Second Hospital of Lanzhou University, Lanzhou 730000, China.