1. Department of Histology and Embryology, Mudanjiang Medical University, Mudanjiang 157011, People's Republic of China
2. Department of Biotechnology, Mudanjiang Medical University, Mudanjiang 157011, People's Republic of China
3. Department of Pathology, Affiliated Second Hospital, Mudanjiang Medical University, Mudanjiang 157011, People's Republic of China
4. Department of General Surgery, Red Flag Hospital, Mudanjiang Medical University, Mudanjiang 157011, People's Republic of China
5. Department of Immunology, Mudanjiang Medical University, Mudanjiang 157011, People's Republic of China
6. Department of Pathogenic Biology and Immunology, Mudanjiang Medical University, Mudanjiang 157011, People's Republic of China