Xu, Fenglin
Yuan, Jingmin
Wu, Hongxia
Article History
Received: 11 January 2023
Accepted: 24 May 2023
First Online: 26 May 2023
Declarations
:
: All methods in this study on humans described in the manuscript were performed in accordance with national law and the Helsinki Declaration of 1975 and its later amendments. Ethical approval for all the CHARLS waves was granted from the Institutional Review Board at Peking University. The IRB approval number for the main household survey is IRB00001052-11015. CHARLS stated that informed consent had been obtained from all respondents.
: Not applicable.
: The authors declare no competing interests.