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Article History

Received: 19 June 2023

Accepted: 21 July 2023

First Online: 27 July 2023

Declarations

:

: The Ethical Committee of Utrecht University approved the design of this study (number 23–0082). Written informed consent will be obtained from children’s legal guardian(s) and children older than 12 years. Additionally, trainers and school leaders will give written active informed consent for their own participation. All experiments were performed in accordance with relevant guidelines and regulations (such as the Declaration of Helsinki).

: Not applicable.

: The authors declare no competing interests.