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Authors
Han, Ying https://orcid.org/0000-0002-4291-0219
Zhang, Liangwen https://orcid.org/0000-0001-5053-8122
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Funding
Funding for this research was provided by:
Youth Project of high-end Science and Technology Innovation think Tank (2021ZZZLFZB1207146)
the National Natural Science Foundation of China ((grant number 81973144))
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Article History
Received: 19 November 2021
Accepted: 22 April 2022
First Online: 4 May 2022
Declarations
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: The present study was approved by the Biomedical Ethics Review Committee of Peking University (IRB00001052–11015). Ethics approval for the use of the China Health and Retirement Longitudinal Study (CHARLS) data was obtained from the University of Newcastle Human Research Ethics Committee (H-2015–0290). All methods were conducted in accordance with the guidelines and regulations of the Declaration of Helsinki, and all the participants or their legal representatives gave their written informed consent before any study procedures began.
: Not applicable.
: The authors declare that they have no competing interests.
