1. State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
2. Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
3. Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China