1. Department of Restorative Dentistry, National Dental Centre Singapore, Singapore Health Services, Singapore
2. Department of Oral and Maxillofacial Surgery, National Dental Centre Singapore, Singapore Health Services, Singapore
3. Medical School, Singapore Health Services, Singapore; Department of Dentistry, Ng Teng Fong General Hospital and Faculty of Dentistry, National University Health System SingaporeNational Dental Research Institute Singapore, National Dental Centre Singapore and Duke-NUS, Singapore