letter . 2020 Oct;49(Suppl 1):143–144. doi: 10.18502/ijph.v49iS1.3691
Copyright © 2020 Dehghani 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.