. 2018 Aug 31;33(3):121–129. doi: 10.4266/acc.2018.00143
Copyright © 2018 The Korean Society of Critical Care Medicine
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
A schematic of study participant flow. ICU: intensive care unit.