1. Department of Preventive Dental Sciences, College of Dentistry, University of Hail, 55476 Hail, Saudi Arabia
2. Conservative Dentistry Unit, School of Dental Sciences, Universiti Sains Malaysia, Health Campus, Kubang Kerian, 16150 Kelantan, Malaysia
3. Preventive Dental Science Department, Faculty of Dentistry, Najran University, 1988 Najran, Saudi Arabia
4. Department of Orthodontics, Faculty of Dentistry, University of Puthisastra, 12211 Phnom Penh, Cambodia
5. Health Professions Education, National University of Medical Sciences, 46000 Rawalpindi, Pakistan
6. Preventive Dentistry Department, College of Dentistry, Jouf University, 72345 Sakaka, Saudi Arabia