1. Department of Restorative Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah P.O. Box 80213, Saudi Arabia
2. Faculty of Dental Medicine, Umm Al-Qura University, Makkah P.O. Box 16786, Saudi Arabia
3. Dental Department, King Khalid University, Asir P.O. Box 61421, Saudi Arabia
4. Dental Department, Vision College, Riyadh P.O. Box 13226, Saudi Arabia
5. Dental Department, Specialized Dental Complex, Jeddah P.O. Box 21444, Saudi Arabia
6. Department of Restorative Dentistry, Suliman Al-Habib Hospital, Riyadh P.O. Box 301578, Saudi Arabia
7. Department of Restorative Dentistry, College of Dental Medicine, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates