Funding for this research was provided by:
Guangdong Planning Office of Philosophy and Social Science (GD20YSH06)
Shenzhen University (860-000002110172)
Received: 23 November 2020
Accepted: 4 February 2021
First Online: 11 February 2021
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the Health Science Center, Shenzhen University. All participants and their parents were informed of the objectives of the study and completing the survey implied consent to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.