Zong, Xu
Gan, Jingwen
Funding for this research was provided by:
University of Helsinki
Article History
Received: 7 March 2025
Accepted: 22 July 2025
First Online: 23 October 2025
Declarations
:
: This study was conducted in accordance with the Declaration of Helsinki. The CHARLS survey got ethical approval from Ethical Review Committee of Peking University.
: Not applicable.
: The authors declare no competing interests.