1. McGill University Faculty of Dentistry, Oral Health and Society Research Unit, Montreal, QC, Canada
2. Umm Al-Qura University Faculty of Dentistry, Department of Preventive Dentistry, Makkah, Saudi Arabia
3. McGill University, Department of Family Medicine, Montreal, QC, Canada
4. King Abdulaziz University, Faculty of Dentistry, Department of Dental Public Health, Jeddah, Saudi Arabia