1. State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Head and Neck Oncology; West China Hospital of Stomatology, Sichuan University; Chengdu China
2. State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Pediatric Dentistry; West China Hospital of Stomatology, Sichuan University; Chengdu China
3. Dental Public Health, Faculty of Dentistry; The University of Hong Kong; Hong Kong China
4. State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Operative Dentistry and Endodontics; West China Hospital of Stomatology, Sichuan University; Chengdu China