1. Center for TMD & Orofacial Pain, Peking University, Hospital & School of Stomatology, Beijing, BJ, China
2. Department of Dentistry, Ng Teng Fong General Hospital, Jurong East, Singapore
3. Faculty of Dentistry, National University of Singapore, Singapore
4. National Dental Research Institute Singapore, National Dental Center Singapore and Duke-NUS Medical School, Singapore Health Services, Singapore
5. Department of Oral & Maxillofacial Radiology, Peking University School & Hospital of Stomatology: National Clinical Research Center for Oral Diseases, Beijing, BJ, China