1. Oral Diagnostic Sciences Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
2. Preventive Dental Sciences, Taibah University Dental College and Hospital, Al-Madinah Al-Munawwarah, Saudi Arabia
3. Taibah University Dental College and Hospital, Al-Madinah Al-Munawwarah, Saudi Arabia
4. Prince Mohammed bin Abdulaziz Hospital, Ministry of National Guard - Health Affairs, Al-Madinah Al-Munawwarah, Saudi Arabia
5. Ministry of Health, Salah Al-Din Primary Health Center, Ha’il, Saudi Arabia
6. Department of Oral Medicine and Diagnostic Sciences, AlFarabi Colleges of Dentistry and Nursing, Riyadh, Saudi Arabia
7. Department of Oral Medicine, Oral Pathology and Oral Radiology, Faculty of Dentistry, Sana’a University, Sana’a, Yemen
8. Faculty of Dentistry, Oral & Craniofacial Sciences, King’s College London, London, United Kingdom
9. World Health Organization Collaborating Centre for Oral Cancer, London, United Kingdom