Shinohara, Asami
Narazaki, Miyabi
Kobayashi, Tessei
Article History
Accepted: 1 July 2022
First Online: 26 July 2022
Declaration
:
: We have no conflicts of interest to declare.
: This study was reviewed and approved by the NTT Communication Science Laboratories ethics committee (Number: R02-011).
: All nursery schools agreed to participate in this study and to use the data anonymously for scientific purposes after explanation to parents.