1. Department of Pathology, West China Second University Hospital, Sichuan University, Chengdu, People's Republic of China
2. Department of Urology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, People's Republic of China
3. Department of Urology, West China Hospital, Sichuan University, Chengdu, People's Republic of China
4. Department of Pathology, West China Hospital, Sichuan University, Chengdu, People's Republic of China