aDepartment of Conservative Densitry, Sharavathi Dental College and Hospital, Shimoga, Karnataka, India
bDental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Kingdom of Saudi Arabia
cConsultant Orthodontist and Restorative Dentist, Springs Dental Care, New Road Side, Horsforth, Leeds, UK
dCollege of Dentistry, Jazan University, Jazan, Saudi Arabia
eKing Saud Bin Abdulaziz University for Health Sciences, College of Dentistry, Riyadh, Kingdom of Saudi Arabia
fDepartment of Periodontics, Al Thager Hospital, Riyadh, Kingdom of Saudi Arabia
gMinistry of Health, Riyadh, Kingdom of Saudi Arabia
© 2016 Korea Centers for Disease Control and Prevention. Published by Elsevier Korea LLC.
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).