1. Conservative Dentistry Unit School of Dental Sciences Universiti Sains Malaysia Health Campus Kota Bharu, Kelantan Malaysia
2. Conservative Dentistry Unit Hospital Universiti Sains Malaysia Health Campus Kota Bharu, Kelantan Malaysia
3. School of Dentistry College of Biomedical and Life Sciences Cardiff University Cardiff UK
4. Department of Restorative Dentistry Faculty of Dentistry University of Malaya Kuala Lumpur Malaysia