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Authors
Liu, Yuxi
Kang, Leni
Zou, Yanna
Yu, Xue
Su, Yiyong
Huang, Chongmei
Liang, Juan
Wang, Yanping
He, Chunhua
Wan, Cheng
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Funding
Funding for this research was provided by:
the National Key Research and Development Program of China (2022YFC2704605)
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Article History
Received: 12 March 2025
Accepted: 8 August 2025
First Online: 9 October 2025
Declarations
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: This study was approved by the Ethics Committee of West China Second University Hospital, Sichuan University, China. Our analysis is based on the national Maternal and Child Health Surveillance System, for which we have obtained a waiver of informed consent from the parents of the died children. Additionally, our report does not contain any personal information of the patients. This study was performed in accordance with the principles of the Declaration of Helsinki.
: Not applicable.
: The authors declare no competing interests.
