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Authors
Zhang, Xiaoning
Chen, Shuang
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Funding
Funding for this research was provided by:
Jiangsu Provincial Department of Education (2014SJB414)
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Article History
Received: 21 June 2019
Accepted: 22 November 2019
First Online: 29 December 2019
Ethics approval and consent to participate
: This study used secondary data from CHARLS. The agency responsible for the survey is Peking University.
: Not applicable.
: The authors declare no conflict of interest.
