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Authors
Lian, Qiguo
Zheng, Tao
Huo, Xiaona
Zhang, Jun
Zhang, Lin
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Funding
Funding for this research was provided by:
IPMCH Three year Action Plan for Improving Clinical Research Capability (IPMCH2022CR1-01A)
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Article History
Received: 14 July 2022
Accepted: 26 September 2022
First Online: 2 November 2022
Declarations
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: The ethics exemption was approved by the Ethics Review Board of the Xinhua Hospital, Shanghai Jiao Tong University School of Medicine (XHEC-C-2015-006), because the data from maternal delivery records in selected hospitals were anonymized and de-identified.
: Not applicable.
: The authors declare that they have no competing interests.
