1. Department of Dental Public Health, Faculty of Dentistry, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300 Kuala Lumpur, Malaysia
2. Oral Health Division, Ministry of Health Malaysia, 62584 Putra Jaya, Malaysia
3. Faculty of Dentistry, SEGi University, No. 9, Jalan Teknologi, Taman Sains Selangor, Kota Damansara, PJU 5, 47810 Petaling Jaya, Selangor, Malaysia
4. International Centre for Casemix and Clinical Coding, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latiff, 56000 Cheras, Kuala Lumpur, Malaysia
5. Department of Health Policy and Management, Faculty of Public Health, Kuwait University, P.O. Box 24923, 13110 Safat, Kuwait