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Authors
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (11772043)
National Natural Science Foundation of China (11972071)
Natural Science Foundation of Hebei Province (A2019202257)
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Article History
Received: 3 January 2020
Accepted: 4 May 2020
First Online: 16 May 2020
Compliance with ethical standards
:
: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
