He, Li
Li, Xiaoyan
Wang, Weidong
Wang, Youfa
Qu, Haiyan
Zhao, Yang
Lin, Danhua
Article History
Received: 11 December 2020
Accepted: 5 March 2021
First Online: 19 March 2021
Declarations
:
: The study received ethics approval from the Institutional Review Board of the Faculty of Psychology, Beijing Normal University. We received written informed consent from at least one of parent or guardian for all students participating in the survey. All methods were performed in accordance with the relevant guidelines and regulations proposed by the Institutional Review Board of the Faculty of Psychology, Beijing Normal University.
: Not applicable.
: The authors declare that they have no conflict of interest.