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Authors
Li, Yongsheng
Tang, Ying http://orcid.org/0000-0001-7515-3552
Zhao, Weimin http://orcid.org/0000-0002-2148-3246
Zhang, Lijun http://orcid.org/0000-0002-5969-2406
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Funding
Funding for this research was provided by:
Natural Science Foundation of Hebei Province (E2019202234)
Department of Education of Hebei Province (BJ2018026)
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Article History
Received: 4 November 2019
Accepted: 20 February 2020
First Online: 2 March 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
