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Authors
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Funding
Funding for this research was provided by:
The National Social Science Fund of China (19FTYB008)
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Article History
Received: 23 June 2020
Accepted: 6 May 2021
First Online: 4 June 2021
Declarations
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: The authors declare that they have no conflict of interest.
: All procedures performed in this study were in accordance with the ethical standards in the 1964 Declaration of Helsinki.
: Written informed consent was obtained from all individual participants included in the study.
