Funding for this research was provided by:
National Natural Science Foundation of China (31972906)
Humanities and Social Sciences Fund Project of the Ministry of Education (20YJC190018)
Article History
Received: 18 November 2019
Accepted: 7 August 2020
First Online: 19 August 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.