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Article History

Received: 19 November 2022

Accepted: 6 May 2023

First Online: 23 May 2023

Declarations

:

: Chinese National Bureau of Statistics provided ethics approval of the survey. All participants knew the purpose of the survey and gave consent to participate. No individual identifiable data (name, address, phone number, etc.) were collected in this study. Our study was conducted in accordance with the Declaration of Helsinki.

: Not applicable.

: The authors declare no competing interests.