1. Oral Cancer Research and Coordinating Centre (OCRCC), Faculty of Dentistry; University of Malaya; Kuala Lumpur Malaysia
2. Faculty of Dentistry; MAHSA University; Selangor Malaysia
3. Department of Community Oral Health and Clinical Prevention, Faculty of Dentistry; University of Malaya; Kuala Lumpur Malaysia
4. School of Pharmacy; Kaohsiung Medical University; Kaohsiung City Taiwan
5. Department of Oral and Maxillofacial Clinical Sciences, Faculty of Dentistry; University of Malaya; Kuala Lumpur Malaysia
6. Oral Health Division, Ministry of Health; Federal Government Administrative Centre; Putrajaya Malaysia