1. Laboratory of Tissue Regeneration and Immunology and Department of Periodontics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, School of Stomatology, Capital Medical University, Beijing, P.R. China.
2. Immunology Research Center for Oral and Systemic Health, Beijing Friendship Hospital, Capital Medical University, Beijing, P.R. China.
3. Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing, P.R. China.