| Affiliation: | 1. West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China;2. State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China;3. State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China |
