1. The First School of Clinical Medicine, Lanzhou University, Lanzhou, Gansu, People's Republic of China
2. Department of General Surgery, The First Hospital of Lanzhou University, Lanzhou, Gansu, People's Republic of China
3. Key Laboratory of Biotherapy and Regenerative Medicine of Gansu Province, Lanzhou, Gansu, People's Republic of China
4. Hepatopancreatobiliary Surgery Institute of Gansu Province, Medical College Cancer Center of Lanzhou University, Lanzhou, Gansu, People's Republic of China
5. Institute of Occupational and Environmental Health, School of Public Health, Lanzhou University, Lanzhou, Gansu, People's Republic of China