Fu, Liping
Fang, Ya’nan
Dong, Yongqing
Funding for this research was provided by:
The National Social Science Fund of China (20AGL034)
Article History
Received: 28 October 2021
Accepted: 7 June 2022
First Online: 28 June 2022
Declarations
:
: 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.
: The authors declare that they have no competing interests.