Jiang, Chaoxin
Jiang, Shan http://orcid.org/0000-0002-7278-1446
Article History
Accepted: 13 January 2022
First Online: 27 January 2022
Declarations
:
: All the procedures involving human participants are performed in accordance with the ethical standards of the institutional and/or national research committee, the 1964 Declaration of Helsinki and its later amendments, or comparable ethical standards. The China Longitudinal Aging Social Survey (CLASS) is approved by the Institutional Review Board at the Renmin University of China.
: Informed consent is obtained from study participants.
: The authors declare no conflicts of interest for this study.