aPublic Health Program, Department of Health Sciences, School of Health Professions, University of Missouri, Columbia, MO, USA
bCommunity Health Program, Nursing Department, School of Natural Sciences & Mathematics, Columbia College of Missouri, Columbia, MO, USA
Copyright ©2018, Korea Centers for Disease Control and Prevention
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)