1. Department of Radiology, The Second Hospital of Tianjin Medical University, Tianjin 300211, China
2. Biochemistry and Molecular Biotechnology, University of Massachusetts Chan Medical School, 364 Plantation Street, LRB 806, Worcester, Massachusetts 01605, United States
3. Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin 300211, China
4. Department of Urology, The Second Hospital of Tianjin Medical University, Tianjin 300211, China
5. Department of Gastroenterology, The Second Hospital of Tianjin Medical University, Tianjin 300211, China