Received: 2 April 2020
Accepted: 19 November 2020
First Online: 23 November 2020
Ethics approval and consent to participate
: The institutional review boards of Saga University Hospital (approval numbers: 2017-04-06, 2017-12-10) and Imamura Hospital (approval number: 2018-01) approved the present study. This study was registered with the University Hospital Medical Information Network Clinical Trials Registry (no. UMIN000030632, ExternalRef removed) on 29 December 2017. Written informed consent was obtained from all participants and their parents or guardians.
: Written informed consent was obtained from all patients for publication of this manuscript.
: The authors declare that they have no competing interests.