1. Faculty of Dentistry; King Abdulaziz University; Jeddah Saudi Arabia
2. Oral Diagnostic Sciences Department; Faculty of Dentistry; King Abdulaziz University; Jeddah Saudi Arabia
3. Department of Oral and Maxillofacial Prosthodontics; Faculty of Dentistry; King Abdulaziz University; Jeddah Saudi Arabia
4. Department of Dental Public Health; Faculty of Dentistry; King Abdulaziz University; Jeddah Saudi Arabia
5. Department of Biostatistics; High Institute of Public Health; Alexandria University; Alexandria Egypt
6. Department of Medical Education; College of Medicine; University of Illinois; Chicago