Jiang, Shan
Dong, Lei http://orcid.org/0000-0002-7485-7619
Article History
First Online: 31 July 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: All the 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 Declaration of Helsinki and its later amendments or comparable ethical standards. The China Education Panel Survey was approved by the Institutional Review Board at the Renmin University of China.
: Informed consent was obtained from study participants.