. 2017 Dec 15;7(Suppl 1):S41–S47. doi: 10.1016/j.jegh.2017.12.001
© 2017 Ministry of Health, Saudi Arabia. Published by Elsevier Ltd.
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).