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. 2022 Jul 7;67:1604945. doi: 10.3389/ijph.2022.1604945

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Copyright © 2022 Yu, Li, Gong, Zhang, Jiang, Zhao, Huang, Li, Liu, Chen, Li, Jiang, Chen and Wu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Geographic locations of air monitoring stations in 14 cities in Liaoning Province, China (Association between maternal exposure to SO₂ and congenital ear malformations in offspring: a population-based case-control study in Liaoning Province, China, 2010–2015).