1. Department of Community Dentistry, Bahria University Medical and Dental College, Karachi 75530, Pakistan
2. Department of Community Dentistry, Doctor Ishrat ul Ebad Khan Institute of Oral Health Sciences, Karachi 7422, Pakistan
3. Department of Physiology, Jinnah Medical and Dental College, Karachi 74800, Pakistan
4. Department of Oral Pathology, Bahria University Medical and Dental College, Karachi 75530, Pakistan
5. Department of Prosthodontics, Altamash Institute of Dental Medicine, Karachi 75500, Pakistan
6. Department of Prosthetic Dental Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
7. Department of Preventive Dentistry, College of Dentistry, Jouf University, Sakaka, Al Jouf 72345, Saudi Arabia
8. Prosthodontics Unit, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kota Bharu, Kelantan, Malaysia