Received: 4 December 2020
Accepted: 15 February 2021
First Online: 3 May 2021
Ethics approval and consent to participate
: Not applicable. (1) Ethics approval was not requested by our institution 16 years ago, at the time of the surgical treatment, because it was not necessary. (2) Consent to participate was not requested, although the parents were informed of our study when we asked them to update the patient’s clinical data to us. In our legal system, their consent is not provided in a formal way.
: Consent for publication was obtained from the parent.
: All authors have no substantial direct or indirect commercial financial incentive associated with publishing the article. The authors declare that they have no competing interests.