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Authors
Hu, Haiyan
Liu, Wenjun
Liu, Yang
Pan, Jay
Zheng, Xiaozuo
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Article History
Received: 1 February 2021
Accepted: 7 July 2021
First Online: 26 July 2021
Declarations
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: Written informed consent was obtained from all the participants, and ethical approval for collecting data on human subjects was received from the Biomedical Ethics Review Committee of Peking University (IRB00001052–11015) [CitationRef removed]. Ethics approval for the use of CHARLS data was obtained from the University of Newcastle Human Research Ethics Committee (H-2015–0290).
: Not applicable.
: The authors report no conflicts of interest in this work.
