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Authors
Zhao, Huanhuan
Sun, Ru
Cao, Sumin
Han, Jingmei
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Article History
Received: 20 February 2024
Accepted: 17 July 2024
First Online: 24 July 2024
Declarations
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: The study was approved by the ethics committee of Cangzhou Central Hospital. Written consent was obtained from the participant’s parents or guardians. The study was performed in strict accordance with the Declaration of Helsinki, Ethical Principles for Medical Research Involving Human Subjects.
: Not applicable.
: The authors declare no competing interests.
