Funding for this research was provided by:
National Social Science Foundation of China (18XJY024)
Article History
Received: 15 December 2022
Accepted: 21 March 2023
First Online: 31 March 2023
Declarations
:
: This is an observational study. We confirmed that no ethical approval is required. Consent to participate is not applicable.
: Not applicable
: The authors declare no competing interests.