1. Department of Preventive Dentistry, College of Medicine and Dentistry, Riyadh Elm University, Riyadh, Saudi Arabia.
2. College of Dentistry, King Khalid University, Abha, Saudi Arabia.
3. Dental Cluster 2 Department, Cluster Health 2 Riyadh, Ministry of Health, Riyadh, Saudi Arabia.
4. College of Dentistry, Almajmaah University, Al Majma’ah, Saudi Arabia.
5. Dental Administration, Ministry of Health, Kuwait City, Kuwait.