Zhao, Fang-Fang
Article History
Received: 6 June 2021
Accepted: 5 October 2021
First Online: 20 October 2021
Declarations
:
: The study obtains the approval of the ethical review of Nantong University in Jiangsu Province, eastern China (2019–17/2020–21). With informed consent, the students’ participation of the survey was totally voluntary. Informed consent online was obtained from their guardians before data collection, considering that the investigation was started in school thus school teachers in charge of them were responsible for them. The ethical committee for the study approved this method of obtaining consent. The instruments used in the study were obtained approval of original authors (Copyright holders) when necessary. The study was conducted following the STROBE checklist.
: Not applicable.
: The author has no competing interests to declare.