Park, Ji Hun
Kang, Tae Wook
Choi, Jimi
Kim, Seul Gi
Ahn, Kyung-Sik
Park, Jong Woong http://orcid.org/0000-0003-2751-2519
Article History
Received: 26 October 2018
Accepted: 26 February 2019
First Online: 27 March 2019
Ethics approval and consent to participate
: This is a retrospective study with ethically approved by the institutional review board of Korea University Medical Center (AN16209–001). This study is retrospective study, therefore we exempted the consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.
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