Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2021 Apr 1;4(2):V14. doi: 10.3171/2021.1.FOCVID20104

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2021, The Authors

This is an open access article distributed under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

Download video file^{(75.9MB, mp4)}