1. Discipline of Endodontology; Faculty of Dentistry; The University of Hong Kong; Hong Kong
2. Department of Restorative Dentistry; Faculty of Dentistry; University of Malaya; Kuala Lumpur Malaysia
3. Dental Public Health; Faculty of Dentistry; The University of Hong Kong; Hong Kong Hong Kong
4. Dental Materials Science; Faculty of Dentistry; The University of Hong Kong; Hong Kong