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Article History

Received: 23 November 2022

Accepted: 31 July 2023

First Online: 10 August 2023

Declarations

:

: This study was conducted according to the guidelines laid down in the Declaration of Helsinki, and all procedures involving research study participants were approved by the [Medical Ethics Committee of Hunan Provincial Center for Disease Control and Prevention]. Written informed consent was obtained from all subjects and their legal guardian(s).

: Not applicable.

: The authors declare that they have no competing interests.