1. College of Life Science, Northwest Normal University, Lanzhou 730070, Gansu Province, China
2. Department of Scientific Research, Gansu Provincial Hospital, Lanzhou 730000, Gansu Province, China
3. Department of Pathology, Gansu Provincial Maternity and Health Care Hospital, Lanzhou 730000, Gansu Province, China
4. Pathology Center, Gansu University of Chinese Medicine, Lanzhou 730000, Gansu Province, China
5. Lanzhou Institute of Food and Drug Control, Lanzhou 740050, Gansu Province, China
6. The First Hospital of Lanzhou University, Department of General Surgery, Lanzhou 730000, Gansu, China