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Article History

Received: 24 March 2023

Accepted: 21 September 2023

First Online: 10 October 2023

Declarations

:

: The author(s) declared no conflict of interest.

: Ethical approval for this study was not required because it was based exclusively on the public available data, CHARLS, and the study subjects were not directly approached. All study participants gave their informed consent for inclusion before they participated in the study. All methods in the present study were carried out in accordance with relevant guidelines and regulations.

: Not applicable.