1. Stomatology Department, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, Sichuan 610072, P.R. China
2. Institute of Chengdu Biology and Sichuan Translational Medicine Hospital, Chinese Academy of Sciences, Chengdu, Sichuan 610041, P.R. China
3. Shuangliu Hospital of Traditional Chinese Medicine, Chengdu, Sichuan 610000, P.R. China
4. Southwest Medical University, Luzhou, Sichuan 646000, P.R. China