1. Maha El Tantawi and Balgis O. Gaffar are with the Department of Preventive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia. Morenike O. Folayan is with the Faculty of Dentistry, Obafemi Awolowo University, Ile-Ife, Nigeria. Mohamed Mehaina is with Bibliotheca Alexandrina, Alexandria, Egypt. Ana Vukovic is with the Department of Pediatric and Preventive Dentistry, School of Dental Medicine, University of Belgrade, Belgrade, Republic of Serbia. Jorge L....