Sim, Ki Choon http://orcid.org/0000-0002-3344-8018
Park, Beom Jin http://orcid.org/0000-0001-9729-4313
Han, Na Yeon
Sung, Deuk Jae
Kim, Min Ju
Han, Yeo Eun
Article History
First Online: 30 August 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict 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.