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Authors
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Funding
Funding for this research was provided by:
Beijing Natural Science Foundation (9202009)
National Natural Science Foundation of China (71971028)
Advanced Innovation Center for Future Education at Beijing Normal University (27900-110631111)
Major Project of National Social Science Fund of China (19@ZH050)
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Article History
First Online: 10 July 2020
Compliance with Ethical Standards
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: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as potential conflicts of interest.
: 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. Prior to the research, ethical approval was obtained from the Academic Ethics Committee at the first author’s institute.
: Informed consent was obtained from all individual participants included in the study.
: Not applicable.
