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Authors
Yang, Chuncheng https://orcid.org/0000-0002-2007-0060
Liu, Zhong
Yu, Mengchun
Bian, Xiufang https://orcid.org/0000-0003-0032-5174
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (51571130)
Natural Science Foundation of Hebei Province (E2019403132)
Hebei Province Foundation for Returnees (C201804)
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Article History
Received: 15 February 2020
Accepted: 2 June 2020
First Online: 22 June 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
