1. Department of Oral Health Policy and EpidemiologyHarvard School of Dental Medicine Boston MA USA
2. Department of Preventive Dental SciencesFaculty of DentistryKing Abdulaziz University Jeddah Saudi Arabia
3. Department of Periodontics and Community DentistryCollege of DentistryKing Saud University Riyadh Saudi Arabia
4. Department of Preventive Dental SciencesCollege of DentistryImam Abdulrahman Bin Faisal University Dammam Saudi Arabia
5. Department of Preventive DentistryFaculty of DentistryUmm Al‐Qura University Makkah Saudi Arabia
6. The National Center for Chronic Disease Prevention and Health PromotionCenters for Disease Control and Prevention Atlanta GA USA