Affiliation: | 1. Department of Epidemiology and Biostatistics, School of Public Health, Curtin University, Perth, WA, Australia;2. State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, Sichuan, China;3. Department of Periodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China |