Affiliation: | 1. Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, , Sichuan, China;2. Department of Periodontology, West China Hospital of Stomatology, Sichuan University, , Sichuan, China;3. Department of Periodontology, the Affiliated Hospital of Stomatology, Chongqing Medical University, , Chongqing, China |