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Authors
Wang, Runfang
Du, LiYan
Di, Jiaoyang
Duan, Ya
Lian, Wenning
Liu, Li
Liu, Suxin
Yang, Dandan
Huo, Yan
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Funding
Funding for this research was provided by:
the medical science research project of Hebei Province (20200740)
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Article History
Received: 14 October 2024
Accepted: 15 April 2025
First Online: 3 May 2025
Declarations
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: This study was authorized by the Health Center for Women and Children of Hebei Province to use the database and approved by the Ethics Review Committee of Hebei General Hospital, following the principles of the Helsinki Declaration. Given the retrospective design of this study, the Ethics Review Committee of Hebei General Hospital opted to waive the requirement for informed consent.
: Not applicable.
: The authors declare no competing interests.
