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Authors
Gao, Jing http://orcid.org/0000-0003-4265-8276
Li, Min
Gao, Shang
Qin, Fei
Cheng, Weiwei http://orcid.org/0009-0007-2007-7629
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Article History
Received: 30 October 2023
Revised: 31 July 2024
Accepted: 27 August 2024
First Online: 10 September 2024
Competing interests
: The authors declare no competing interests.
: This study conformed to the principles of the Declaration of Helsinki. Considering the retrospective nature of the study, the Ethics Committee of the International Peace Maternity and Child Health Hospital waived the requirement for informed consent.
