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Authors
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Funding
Funding for this research was provided by:
Youth talent support program in Hebei Province of China and Humanities-Society Scientific Foundation of Hebei Educational Committee of China
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Article History
Received: 17 April 2020
Accepted: 14 September 2020
First Online: 29 September 2020
Compliance with ethical standards
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: The authors declare that they have no conflict of interest.
: Informed consent was obtained from all individual participants included in the study.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
