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Authors
Zhang, Ling
Yang, Yating
Li, Mengdie
Zhou, Xiaoqin
Zhang, Kai
Yin, Xuai
Liu, Huanzhong
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Article History
Received: 26 October 2021
Accepted: 17 March 2022
First Online: 29 March 2022
Declarations
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: All methods in this study were carried out in accordance with the principles of the Helsinki declaration. All pregnant women participating in this research provided written informed consent. The ethics committee of Chaohu Hospital of Anhui Medical University approved this research.
: Not applicable in the declarations section.
: The authors did not report a latent conflict of interest.
