1. Dental Public Health, Faculty of Dentistry, University of Hong Kong, Prince Philips Dental Hospital, Hong Kong
2. Faculty of Dentistry, University Sains Islam Malaysia, Kuala Lumpur, Malaysia
3. Oral Rehabilitation, Faculty of Dentistry, University of Hong Kong, Prince Philips Dental Hospital, Hong Kong,
4. Periodontology & Public Health, Faculty of Dentistry, University of Hong Kong, Prince Philips Dental Hospital, Hong Kong