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Authors
Qi, Linghong
Qian, Cheng
Liu, Jiami
Fei, Zhenghua
Zhou, Yinjian
Li, Zhi
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Article History
Received: 12 June 2025
Accepted: 8 November 2025
First Online: 31 March 2026
Ethics approval and consent to participate
: This is a retrospective study. Ethics committee approval was granted by the Huzhou Maternity & Child Health Care Hospital (IRM No.: 2025-J-029). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: The requirement of written informed consent was waived.
: The authors declare that they have no competing interests.
