1. Department of Stomatology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, China
2. Anhui Key Laboratory of Infection and Immunity, Bengbu Medical College, Bengbu, China
3. Department of Stomatology, Bengbu Medical College, Bengbu, China
4. Department of Stomatology, Huaiyuan county people’s Hospital, Bengbu, China
5. Department of Histology and Embryology, Bengbu Medical College, Bengbu, China