Xie, Donghong http://orcid.org/0000-0002-0205-6345
Wang, Jiwen
Funding for this research was provided by:
U.S.-China Fulbright Program (no)
Article History
Received: 6 April 2020
Accepted: 26 October 2020
First Online: 7 November 2020
Ethics approval and consent to participate
: The original CHARLS was approved by the Ethical Review Committee of Peking University, and all participants signed informed consent forms.
: All authors agree to publish.
: The authors have declared that no competing interests exist.