1. Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials Shanxi Medical University School and Hospital of Stomatology Taiyuan Shanxi China
2. Department of Endodontics Shanxi Medical University School and Hospital of Stomatology Taiyuan Shanxi China
3. Department of Pathology Shanxi Medical University Taiyuan Shanxi China
4. Department of Oral Medicine Shanxi Medical University School and Hospital of Stomatology Taiyuan Shanxi China
5. Institute of Biomedical Research Shanxi Medical University Taiyuan Shanxi China