Chen, Xinlan
Su, Dai
Chen, Xinlin
Chen, Yingchun
Funding for this research was provided by:
Foundation for Innovative Research Groups of the National Natural Science Foundation of China (71673101)
Article History
Received: 15 May 2021
Accepted: 23 February 2022
First Online: 1 March 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.IRB 00001052–11015). All participants in the survey signed or marked (if illiterate) the informed consent forms. All methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.