1. Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University and Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, Guangdong, P.R. China
2. Guangdong Traditional Medical and Sports Injury Rehabilitation Research Institute, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong, P.R. China
3. The Affiliated Stomatological Hospital of Southern Medical University & Guangdong Provincial Stomatological Hospital, Guangzhou, Guangdong, P.R. China
4. The First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, Guangzhou, Guangdong, P.R. China