Funding for this research was provided by:
National Natural Science Foundation of China (11832003, 11772016, 11472022)
Beijing Municipal Commission of Education (KZ201810005007)
China Scholarship Council (201906540036)
Article History
Received: 24 December 2019
Revised: 6 July 2020
Accepted: 6 August 2020
First Online: 15 August 2020
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: 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.
: Informed consent was obtained from all individual participants included in the study.