1Department of Nursing, Asan Medical Center, Seoul, Korea
2Department of Surgery, National Medical Center, Seoul, Korea
3Department of Surgery, Ulsan University Hospital, Ulsan, Korea
4Department of Trauma Surgery, Gil Medical Center, Gachon University College of Medicine, Incheon, Korea
5Division of Acute Care Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
Copyright © 2019 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.