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 China
2. Department of Stomatology Beijing Tiantan Hospital Capital Medical University Beijing China
3. School of Dental Medicine University of Pennsylvania Philadelphia PA USA
4. Department of Orthodontics School of Stomatology the Third Dental Center Peking University Beijing China
5. Department of Orthodontics School of Stomatology Capital Medical University Beijing China