Sim, Ki Choon
Park, Beom Jin https://orcid.org/0000-0002-7289-3683
Han, Na Yeon
Sung, Deuk Jae
Kim, Min Ju
Han, Yeo Eun
Article History
First Online: 19 June 2020
Conflict of interest
: The authors declare that they have no conflicts of interest.
: 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.
: The Institutional Review Board waived the requirement for informed consent for this retrospective study.
: The authors agreed to participate in the paper.
: All authors agree with the publication.