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Authors
Park, Byeong-Seop
Chung, Chin Youb
Park, Moon Seok
Lee, Kyoung Min
Cho, Seong Hee
Sung, Ki Hyuk http://orcid.org/0000-0002-5007-2403
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Article History
Received: 21 March 2019
Accepted: 19 November 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: This study was approved by the institutional review board of Seoul National University Bundang Hospital (IRB number: B-1806/477–101), which waived informed consent because of its retrospective design.
: Not applicable.
: The authors declare that they have no competing interests.
