Funding for this research was provided by:
National Research Foundation of Korea (2016R1D1A1B03933410, 2018R1D1A1B07048821, 2013R1A6A3A04059017, 2018R1A2B6004608)
National Cancer Center (NCC-1810220-01)
Text and Data Mining valid from 2019-07-15
Received: 3 January 2019
Accepted: 4 July 2019
First Online: 15 July 2019
Ethics approval and consent to participate
: The Institutional Review Board of the Seoul National University (IRB No. E1503/002–001) granted ethics approval and waived informed consent. Permission is not required to get access to the Korean birth data or regulatory air pollution monitoring data.
: Not applicable.
: The authors declare that they have no competing interests.