1. Conservative Dentistry Unit, School of Dental Sciences, Universiti Sains Malaysia, Health campus, Kota Bharu, Malaysia
2. Department of Dental Materials, Faculty of Dentistry, Asian Institute of Medicine, Science and Technology (AIMST) University, Bedong, Kedah, Malaysia
3. Department of Family Oral Health, Faculty of Dentistry, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
4. Department of Restorative Dentistry, Faculty of Dentistry, Universiti of Malaya, Kuala Lumpur, Malaysia
5. Prosthodontics Unit, School of Dental Sciences, Universiti Sains Malaysia, Health campus, Kota Bharu, Malaysia