1. Department of Oral and Diagnostic Sciences, King Abdul-Aziz University – Faculty of Dentistry, Jeddah, Saudi Arabia
2. Department of Endodontics, King Abdul-Aziz University – Faculty of Dentistry, Jeddah, Saudi Arabia
3. Department of Maxillofacial Surgery and Diagnostic Sciences, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
4. King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
5. Dental Services, Ministry of the National Guard-Health Affairs, Riyadh, Saudi Arabia
6. Department of Prosthodontics, Batterjee Dental College, Jeddah, Saudi Arabia
7. Department of Preventive Dental Sciences, Taibah University – College of Dentistry, Medina, Saudi Arabia
8. Department of Medicine, King Faisal Specialist Hospital and Research Center, Jeddah, Saudi Arabia.