1. College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
2. King Saud bin Abdulaziz University for Health Sciences, Dental Services-CR, King Abdulaziz Medical City-Riyadh, National Guard Health Affairs, P.O. Box 22490, Riyadh 11426, Saudi Arabia
3. College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, KAMC, National Guard Health Affairs, Riyadh, Saudi Arabia
4. Saudi Speciality Certificate Program in Orthodontics, King Abdulaziz Medical City, National Guard Health Affairs, Riyadh, Saudi Arabia
5. Endodontic Division, King Abdulaziz Medical City, National Guard Health Affairs, Riyadh, Saudi Arabia
6. Department of Dental Public Health, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, KAMC, National Guard Health Affairs, Riyadh, Saudi Arabia