1. Hafizah Ibrahim, DDS, MClinDent, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
2. *Azwatee Abdul Aziz, BDS, MClinDent, PhD, Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
3. Noor Azlin Yahya, DipTrans, BDS, MDentSci, Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia
4. Adrian U-Jin Yap, BDS, MSc, PhD, Grad Dip Psychotherapy, Department of Dentistry, Ng Teng Fong General Hospital and Faculty of Dentistry, National University Health System, Singapore; National Dental Research Institute Singapore, National Dental Centre and Duke-NUS Medical School, Singapore Health Services, Singapore