Ma, Xinxin
Oshio, Takashi http://orcid.org/0000-0001-8142-5585
Funding for this research was provided by:
Japan Society for the Promotion of Science (20H01512, 20K01722)
Article History
Received: 1 September 2020
Accepted: 19 November 2020
First Online: 1 December 2020
Ethics approval and consent to participate
: The dataset that was used in this study, the China Health and Retirement Longitudinal Study (CHARLS), is publicly available (ExternalRef removed), and its study protocol was approved by the Ethical Review Committee of Peking University, China. Hence, ethical approval was not required for this study. Survey data was obtained from Peking University with its official permission. Therefore, the current study did not require further ethical approval and the need for written consent was waived by the committee.
: Not applicable.
: The authors declare no competing interests.