Funding for this research was provided by:
National Social Science Fund of China (20AGL034)
Article History
Accepted: 15 December 2023
First Online: 9 February 2024
Declarations
:
: The authors declare no conflict of interest.
: The data used in this study were retrieved from the CHARLS. This survey was endorsed by the Biomedical Ethics Committee of Peking University (No. IRB00001052–11015). All participants in the survey signed or marked (if illiterate) the informed consent forms.
: Not applicable.