aDepartment of Nutrition Education, Kyonggi University, Suwon, Korea
bYongin Center for Children’s Food Service Management, Yongin, Korea
cAnyang Center for Children's Food Safety Experience, Anyang, Korea
dDepartment of Food and Nutrition, Kangwon National University, Samcheok, Korea
Copyright © 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/).