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

. 2023 Nov 21;101(21):e2103–e2113. doi: 10.1212/WNL.0000000000207878

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

Copyright © 2023 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Academy of Neurology.

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND), which permits downloading and sharing the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.

PMC Copyright notice

*A PRISMA flow diagram of the original search conducted in May 2021 is provided in eFigure 1 (links.lww.com/WNL/D158). ^†A total of 16 studies included in the review reported only respiratory and bulbar outcomes and are not considered further in this manuscript. HTA = health technology assessment; PRISMA = Preferred Reporting Items for Systematic Reviews and Meta-Analyses.