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Authors
Xu, Wuping
Xu, Xuedong
Zhang, Min
Sun, Chiping
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Article History
Received: 11 March 2025
Accepted: 21 May 2026
First Online: 3 June 2026
Declarations
Ethics approval and consent to participate: The procedures received approval from the Ethics Review Board of the National Center for Health Statistics and adhered to the principles outlined in the Declaration of Helsinki. Informed consent was obtained from every participant involved in the study.
Consent for publication: Not applicable.
Competing interests: The authors declare no competing interests
