Received: 6 July 2020
Accepted: 15 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: Ethics approval and consent to participate has been given by the patients, and the patients’ parents. The study was approved by the Jikei University School of Medicine ethics committee: reference number 26–057(7562).
: Written informed consent was obtained from the patients’ parents for publication of this case report.
: The authors declare that they have no competing interests.