Liu, Yan
Liu, Zhaorui
Liang, Richard
Luo, Yanan
Funding for this research was provided by:
Major Project of the National Social Science Fund of China (21&ZD187)
the National Social Science Fund of China (21CRK014)
Article History
Received: 11 January 2022
Accepted: 12 April 2022
First Online: 28 April 2022
Declarations
:
: The study was conducted according to the guidelines of the Declaration of Helsinki, approved by the Ethical Review Committee (IRB) at Peking University (IRB00001052–11015). All participants involved in the study provided written informed consent before recruitment to the study.
: Not applicable.
: The authors declare that they have no competing interests.