Ethics approval and consent to participate
This study has been approved by the Institutional Review Board on Human Subjects Research and Ethics Committees, Soonchunhyang University, Cheonan, Republic of Korea (Approval No. 1040875-202012-BR-095, 1040875–202009-BR-075 and 1040875–202104-BR-030). All subjects and their parents or legal guardians were thoroughly briefed on the purpose of the study, experimental procedures, and potential risks. Participants were children and adolescents between the ages of 9–15. Before the study was undergone, informed consent/assent to participate in the study was obtained from the participant’s parents or legal guardians of all the children and adolescents who took part in the study in the form of a statement in a manuscript. This study clearly states that the informed consent of participants (their parent or legal guardian in the case of children under 16) was obtained. All procedures complied with the 2013 Helsinki Declaration of the World Medical Association.