Min, Ji Hye
Jang, Kyung Mi
Cha, Dong Ik
Kang, Tae Wook
Kim, Seong Hyun
Choi, Seo-Youn
Min, Kwangseon
Article History
First Online: 7 November 2018
Compliance with ethical standards
:
: The authors (Ji Hye Min, Kyung Mi Jang, Dong Ik Cha, Tae Wook Kang, Seong Hyun Kim, Seo-Youn Choi, and Kwangseon Min) declare no conflict of interest.
: Research involving human participants and/or animals: Research involving human participants. 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.
: This retrospective study was approved by our institutional review board, and the requirement for informed consent was waived.