Li, Wenyan
Guo, Yangfeng
Lai, Wenjian
Wang, Wanxin
Li, Xiuwen
Zhu, Liwan
Shi, Jingman
Guo, Lan
Lu, Ciyong
Funding for this research was provided by:
Natural Science Foundation of Guangdong Province (2019A1515011091)
National Natural Science Foundation of China (81761128030)
Article History
Received: 22 November 2022
Accepted: 23 January 2023
First Online: 8 February 2023
Declarations
:
: The study procedures were carried out in accordance with the Declaration of Helsinki. This study was approved by the Sun Yat-sen University, School of Public Health Institutional Review Board (Ethics Number: L2017060). Before the study commenced, the students and their parents were informed of the purpose of the study, that participation was voluntary, and that their answers were anonymous and confidential. Written informed consent was obtained from all participating students as well as one of their parents.
: Not applicable.
: The authors declare that they have no competing interests.