1. Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian 116021, China
2. Department of Internal Medicine, University of California, Davis, USA
3. Department of Imaging, First Affiliated Hospital of Dalian Medical University, Dalian 116021, China
4. Department of Pathology, Dalian Friendship Hospital, Dalian 116021, China
5. School of Information Science and Technology of Dalian Maritime University, 116000 Dalian City, Liaoning Province, China