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Authors
Jiang, Li
Li, An-qiong
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Article History
Received: 18 June 2024
Accepted: 8 September 2024
First Online: 17 September 2024
Declarations
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: There are no financial or other relationships that might lead to conflict of interest.
: The study was approved by the Ethics Committee of Chengdu Pidu District Maternal and Child Health Care Hospital, Sichuan (Ethics Approval No: 2021NO.02). According to our ethics committee, retrospective research can be conducted by disclosing information on the website.
