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Authors
Zhou, Yue
Wushouer, Haishaerjiang
Vuillermin, Daniel
Ni, Bingyu
Guan, Xiaodong
Shi, Luwen https://orcid.org/0000-0002-8070-9161
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (71774005)
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Article History
Received: 22 July 2019
Accepted: 8 July 2020
First Online: 14 July 2020
Ethics approval and consent to participate
: Ethical approval for this study was not necessary because it was based exclusively on publicly available data, CHARLS, and the study subjects were not directly approached.
: Not applicable.
: The authors declare that they have no competing interests.
