Chae, Hyun-Wook
Na, Ji-Hoon
Kwon, Ahreum
Kim, Ho-Seong
Lee, Young-Mock http://orcid.org/0000-0002-5838-249X
Article History
Received: 16 April 2020
Revised: 2 September 2020
Accepted: 7 September 2020
First Online: 10 September 2020
Compliance with ethical standards
: All procedures were approved by the Institutional Review Board (IRB) of Gangnam Severance Hospital, Seoul, South Korea (IRB number 3-2015-0135). Informed consent was obtained from the parent/legal guardian of all patients, and all methods were performed in accordance with the relevant guidelines and regulations of the IRB.
: The authors declare that there are no conflicts of interest.