. 2014 May 15;5(3):161–168. doi: 10.1016/j.phrp.2014.04.008
© 2014 Published by Elsevier B.V. on behalf of 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/3.0/).