Fan, Xiaojing
Su, Min
Si, Yafei
Zhao, Yaxin
Zhou, Zhongliang
Funding for this research was provided by:
National Natural Science Foundation of China (72004178)
Natural Science Foundation of Inner Mongolia (2020BS07002)
Philosophy and Social Science Foundation of Shaanxi Province (2020R032)
Article History
Received: 1 March 2021
Accepted: 21 April 2021
First Online: 24 May 2021
Declarations
:
: Ethical approval for collecting data on human subjects was received at Peking University by their institutional review board (IRB) (protocol code IRB00001052-11015 and January 2011). All procedures were in accordance with the ethical standards of the Helsinki Declaration. Participants provided informed consent prior to data collection.
: Not applicable.
: The authors declare that they have no competing interests.