Lee, S. R. http://orcid.org/0000-0003-0201-0627
Park, P. J.
Article History
Received: 23 June 2018
Accepted: 25 October 2018
First Online: 30 October 2018
Compliance with ethical standards
:
: The authors have no conflict of interest to disclose.
: This study was approved by the Institutional Review Board of Damsoyu Hospital.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual patients or their parents/guardians.