1. The Second Clinical Medical College, Lanzhou University, Lanzhou, 730030, PR China
2. Department of Tumor Surgery, Lanzhou University Second Hospital, Lanzhou, 730030, PR China
3. Department of Vision Rehabilitation, Gansu Province Hospital Rehabilitation Center, Lanzhou, 730030, PR China
4. Key Laboratory of Digestive System Tumors, Lanzhou University Second Hospital, Lanzhou, 730030, PR China