Park, Jee Soo
Lee, Yong Seung
Lee, Cho Nyeong
Kim, Sung Hoon
Kim, Sang Woon
Lee, Hyeyoung
Han, Sang Won
Article History
Received: 7 June 2018
Accepted: 13 December 2018
First Online: 2 January 2019
Compliance with ethical standards
:
: All of the authors declare that they have no conflicts of interest.
: All procedures performed in the 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 not required for the purposes of this study, as it was based upon retrospective anonymous patient data and did not involve patient intervention or the use of human tissue samples.