1. Shenzhen Stomatological Hospital, Southern Medical University, Shenzhen, People’s Republic of China
2. Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou, People’s Republic of China
3. Department of Public Health and Social and Behavioral Sciences, West China School of Public Health, Sichuan University, Chengdu, People’s Republic of China