Kim, Eun Jin
Lee, Woonji
Jeong, Woo Yong
Choi, Hen
Jung, In Young
Ahn, Jin Young
Jeong, Su Jin
Ku, Nam Su http://orcid.org/0000-0002-9717-4327
Choi, Jun Yong
Choi, Young Hwa
Song, Young Goo
Kim, June Myung
Funding for this research was provided by:
National Research Foundation of Korea (2017R1C1B5017875)
Yonsei University College of Medicine (6-2017-0054)
Article History
Received: 22 January 2018
Accepted: 26 July 2018
First Online: 2 August 2018
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board of the Yonsei University Health System Clinical Trial Center. The requirement for informed consent was waived because this was a retrospective study involving a review of electronic medical records.
: Not applicable.
: The authors declare that they have no competing interests.
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