Funding for this research was provided by:
Grants-in-Aid from the Ministry of Education, Culture, Sports, Science and Technology, Japan (17K11967)
Received: 16 March 2021
Accepted: 19 October 2021
First Online: 28 October 2021
: This study was approved by the Human Investigation Committee of Kyushu Dental University (approval number: 18–37) and all participants and their parents/guardians provided written informed consent for participation in the study. The study protocol was carried out in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors declare that have no competing interests.