Received: 24 July 2019
Accepted: 12 December 2019
First Online: 26 December 2019
Ethics approval and consent to participate
: The Institutional Review Board of Kyungpook National University Chilgok Hospital (KNUCH 2019–03-005) approved this retrospective study, and the parents of the patient provided informed consent to have his data (including de-identified photographs) recorded, analyzed, and published for research purposes.
: The parent of the patient signed a written informed consent for publication of their medical data and images.
: The authors declare that they have no competing interests.