Received: 1 January 2021
Accepted: 16 March 2021
First Online: 6 April 2021
: The study was approved by the Institutional Review Board of Nagoya University Graduate School of Medicine (no. 9069). Written consent to participate was obtained from the parents/guardians of the minors included in this study (minors are considered anyone under the age of 16).
: Not applicable.
: The authors declare that they have no competing interests.