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