1. Preventive Dental Science Department, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
2. King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
3. Ministry of the National Guard - Health Affairs, Riyadh, Saudi Arabia
4. College of Public Health and Health Informatics, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
5. Oral Medicine and Diagnostic Science Department, Oral and Maxillofacial Radiology Division, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
6. Periodontics Resident, Dental University Hospital, King Saud University, Riyadh, Saudi Arabia