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Authors
Li, Xiaowei
Zhang, Wanda
Zhang, Weiya
Tao, Ke
Ni, Wenli
Wang, Kai
Li, Zhanglai
Liu, Qiang
Lin, Jianhao https://orcid.org/0000-0002-4240-6995
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (81902247)
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Article History
Received: 16 September 2019
Accepted: 11 October 2020
First Online: 10 November 2020
Ethics approval and consent to participate
: CHARLS was approved by the Ethical Review Committee (IRB) at Peking University, Beijing, China. All the participants signed informed consent voluntarily.
: Not applicable.
: None of the authors have any competing interests.
