. 2021 Mar 18;54(2):182–192. doi: 10.5946/ce.2020.057
Copyright © 2021 Korean Society of Gastrointestinal Endoscopy
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Fig. 1.
High-flow nasal cannula Optiflow.