1. Department of Oral Maxillofacial Surgery and Oral Diagnosis, Faculty of Dentistry, International Islamic University Malaysia, Kuantan, Pahang, Malaysia
2. Department of Fundamental Dental and Medical Sciences, Kulliyyah of Dentistry, International Islamic University Malaysia, Kuantan, Pahang, Malaysia
3. Oral Health Division, Ministry of Health, Kuala Lipis, Pahang, Malaysia
4. Oral Health Division, Ministry of Health, Kadut, Sabah, Malaysia
5. Department of Prosthodontics, Faculty of Dentistry, Lincoln University College, Petaling Jaya, Selangor, Malaysia