1. Department of Periodontics & Oral Medicine, College of Stomatology, Guangxi Medical University, Nanning, China
2. Guangxi Health Commission Key Laboratory of Prevention & Treatment for Oral Infectious Diseases, Nanning, China
3. Pharmaceutical College, Guangxi Medical University, Nanning, China
4. Guangxi Key Laboratory of Oral & Maxillofacial Rehabilitation & Reconstruction, Nanning, China