1 Department of Stomatology, The Seventh Affiliated Hospital, Southern Medical University, 28 Desheng Liguan Road, Foshan, 528244, Guangdong, P. R. China.
2 Department of Stomatology, The First Affiliated Hospital of Guangzhou Medical University, 151 Yanjiang Road, Guangzhou, 510120, Guangdong, P. R. China.
3 National Center for respiratory medicine, state Key Laboratory of Respiratory Disease & National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, Guangdong, P. R. China.
4 Department of Stomatology, The Seventh Affiliated Hospital, Southern Medical University, 28 Desheng Liguan Road, Foshan, 528244, Guangdong, P. R. China. 921543416@qq.com.
5 Department of Stomatology, The First Affiliated Hospital of Guangzhou Medical University, 151 Yanjiang Road, Guangzhou, 510120, Guangdong, P. R. China. jianxin-ji@126.com.