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Authors
Koh, Yong-Gon
Nam, Ji-Hoon
Chung, Hyun-Seok
Kim, Hyo-Jeong
Lee, Hwa-Yong
Kang, Kyoung-Tak https://orcid.org/0000-0002-1036-193X
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Article History
Received: 10 July 2019
Accepted: 16 September 2019
First Online: 23 September 2019
Compliance with ethical standards
:
: The authors declare no conflict of interest.
: Ethical approval was obtained from the institutional review board of author's hospital.
: There was no funding for this study.
