1. State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
2. Tianjin Medical University School of Stomatology, Tianjin 300203, China
3. State Key Laboratory of Oral Diseases, Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, PR China
4. College of Biomedical Engineering, Sichuan University, Chengdu 610041, China