. 2021 May;50(5):852–865. doi: 10.18502/ijph.v50i5.6103
Copyright © 2021 Amir Esmaili et al. Published by Tehran University of Medical Sciences
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International license (https://creativecommons.org/licenses/by-nc/4.0/). Non-commercial uses of the work are permitted, provided the original work is properly cited.
Fig. 2:
Characteristics of the included studies