1. Special Care Dentistry Unit, Department of Oral Diagnosis and Oral Maxillofacial Surgery, Kulliyyah of Dentistry, International Islamic University Malaysia, Kuantan, Malaysia
2. Department of Family Medicine, Kulliyyah of Medicine, International Islamic University Malaysia, Kuantan, Malaysia
3. Special Care Dentistry Unit, Universiti Teknologi Malaysia, Kuantan, Malaysia
4. Kulliyyah of Dentistry, International Islamic University Malaysia, Kuantan, Malaysia
5. Dental Clinic Pekan Tajau, Maran District, Dental Health Unit, Oral Health Department, Ministry of Health, Pahang, Malaysia