Chang, Hyun
Lee, Soo Jin
Lim, Jin
Lee, Jong Seok
Kim, Yu Jung
Lee, Won Woo
Article History
Received: 9 December 2018
Accepted: 14 January 2019
First Online: 21 March 2019
Compliance with ethical standards
:
: Author H.C. declares that he/she has no conflict of interest. Author S.J.L. declares that he/she has no conflict of interest. Author J.L. declares that he/she has no conflict of interest. Author J.S.L declares that he/she has no conflict of interest. Author Y.J.K declares that he/she has no conflict of interest. Author W.W.L declares that he/she has no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: The requirement for informed consent was waived in view of the retrospective nature of the study.