Meng, Lijun
Zhou, Chunliang
Xu, Yiqing
Liu, Fuqiang
Zhou, Cui
Yao, Meng
Li, Xingli
Funding for this research was provided by:
Natural Science Foundation of Hunan Province (2020JJ4388)
Major Scientific and Technological Projects for Collaborative Prevention and Control of Birth Defects in Hunan Province (2019SK1012)
Article History
Received: 29 June 2022
Accepted: 31 August 2022
First Online: 12 September 2022
Declarations
:
: This study was approved by the Medical Ethics Committee of the Hunan Provincial Center for Disease Control and Prevention. As it was based on non-identified data for secondary analysis, this study did not require written informed consent.
: Not applicable.
: Not applicable.
: The authors declare no competing interests.