. 2023 Mar 31;15(1):3–23. doi: 10.52054/FVVO.15.1.065
Copyright © 2023 Facts, Views & Vision
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 2.
Levels of evidence and grades of recommendations.