Funding for this research was provided by:
The Research Institute of Science and Technology for Society of the Japan Science and Technology Agency (JPMJRX17A1, JPMJRX20IA)
Article History
Received: 11 November 2021
Accepted: 24 January 2022
First Online: 3 February 2022
Declarations
:
: The study was conducted with the approval of the Institutional Review Board of the authors’ university (201904 for Study 1 and 202012 for Study 2).
: Written informed consent was obtained from the principals of each school. Only data obtained through the opt-out consent process from the children were used.
: The authors declare that they have no conflict of interest.