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Authors
Lee, De-Chih
Wang, Jing
Shi, Leiyu
Wu, Caroline
Sun, Gang
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Article History
Received: 16 September 2021
Accepted: 12 January 2022
First Online: 3 February 2022
Declarations
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: Not Applicable. The study does not involve human subjects and is deemed exempt for IRB review. The study is totally based on available (public domain) secondary dataset titled China Health and Retirement Longitudinal Study (CHARLS) database. We confirm that all methods were performed in accordance with the relevant ethical guidelines and regulations.
: Not Applicable.
: There are no competing interests by the authors of this paper.
