Article History
Received: 27 August 2020
Accepted: 31 March 2022
First Online: 27 April 2022
Competing interests
: The authors declare no competing interests.
: This study was undertaken entirely in Japan, and received ethical approval from the Research Ethics Committee of University of Fukui (Approval No. 20150107). This study has been performed in accordance with the Declaration of Helsinki and Ethical Guidelines for Medical and Health Research involving Human subjects (Ministry of Health, Labour and Welfare, Japan).
: Informed consent was obtained from all participants and their legal guardians.