Kim, Kyungeun
Cho, Younghye
Sohn, Jin Hee
Kim, Dong-Hoon
Do, In Gu
Lee, Hyun Joo
Do, Sung-Im
Ahn, Sangjeong
Lee, Hyoun Wook
Chae, Seoung Wan http://orcid.org/0000-0003-0406-4469
Article History
Received: 7 October 2018
Accepted: 31 January 2019
First Online: 8 February 2019
Ethics approval and consent to participate
: This retrospective study was approved by the Institutional Review Board of Kangbuk Samsung Hospital (No. 2016–10–030-004). The waiver of individual patient informed consent was obtained due to minimal risk nature of this study.
: Not applicable.
: The authors declare that they have no competing interests.
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