. 2021 Nov 29;18(23):12562. doi: 10.3390/ijerph182312562
© 2021 by the authors.
Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Figure 3.
Funnel plot of publication bias assessment.