1. Cuiying Biomedical Research Center, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China.
2. Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China.
3. Lanzhou Huazhitiancheng Biotechnologies Co., Ltd, Lanzhou, Gansu 730000, China.
4. Department of Pathology, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China.