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Authors
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Funding
Funding for this research was provided by:
Science Foundation of North University of China (XJJ201915)
Shanxi Scholarship Council of China (2020-112)
Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (2020L0268, 2020L0307)
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Article History
Received: 3 November 2020
Accepted: 24 December 2020
First Online: 5 January 2021
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
