1 Department of Prosthodontics, Faculty of Dentistry, Thamar University, Dhamar, Yemen.
2 Department of Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia.
3 Department of Oral Medicine, Oral Pathology and Oral Radiology, Faculty of Dentistry, Sana'a University, Yemen.
4 College of Dental Medicine, QU Health, Qatar University, Doha, Qatar.
5 Dental Biomaterials Research Chair, Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Kingdom of Saudi Arabia.
6 Department of Restorative and Prosthetic Dental Sciences, College of Dentistry, Dar Al Uloom University, Riyadh, Kingdom of Saudi Arabia.
7 Department of Preventive Dental Sciences, College of Dentistry, Prince Sattam bin Abdulaziz University, Alkharj, Saudi Arabia.
8 Department of Prosthodontics, College of Dentistry, Ibb University, Ibb, Yemen.