1. Faculty of Dentistry, Restorative Dental Sciences, The University of Hong Kong, Hong Kong, China.
2. Shenzhen Stomatology Hospital (Pingshan), Southern Medical University, Shenzhen, China.
3. The Affiliated Stomatological Hospital of Xuzhou Medical University, Xuzhou, China.
4. Peking University School of Stomatology, Beijing, China.
5. Li Ka Shing Faculty of Medicine, School of Biomedical Sciences, The University of Hong Kong, Hong Kong, China.