. 2021 Dec 24;2021:7230063. doi: 10.1155/2021/7230063
Copyright © 2021 Ruochen Shao et al.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 3.
Funnel plot analysis of publication bias.