Kim, Geon Woo
Jung, Hwi Kyeong
Sung, Jae Moon
Kim, Jae Soon
Kim, Chang Woo http://orcid.org/0000-0002-6723-769X
Article History
Received: 24 July 2019
Accepted: 28 November 2019
First Online: 4 December 2019
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest and received no funding concerning this article.
: 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.
: For this type of study with retrospective design, formal consent is not required.