1. Department of Preventive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
2. Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
3. Department of Community Dentistry, Dow International Dental College, Karachi, Pakistan
4. School of Dental Medicine, University of Colorado, Anschutz Medical Campus, Aurora, USA