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Article History

Received: 26 May 2021

Accepted: 30 November 2021

First Online: 11 December 2021

Declarations

:

: We have confirmed that all the methods and procedures were performed in accordance with the relative guidelines and regulations. Assent was obtained from participates and informed consent was obtained from their main guardian prior to the pencil-and-paper questionnaires being filled in at school. Teachers were involved in obtaining parental consent, this included passive parental consent where an information sheet was given to parents/guardians allowing them the opportunity to consider whether their child should take part in and providing them the opportunity to inform the teacher if they did not want their child to participate. If the parent did not inform the teacher that they objected to the research, it was passively assumed that the teacher had their consent for the child to participate (Hollmann & McNamara, 1999). The entire research procedure also received approval from Ethics Committee of Suzhou Guangji Hospital (SGLS2017–037).

: Not applicable.

: The authors declare that they have no competing interests.