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Authors
Sung, Ki Hyuk
Chung, Chin Youb
Lee, Kyoung Min
Kwon, Ki Bum
Lee, Jeong Hyun
Park, Moon Seok
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Article History
Received: 14 November 2019
Accepted: 13 April 2020
First Online: 16 April 2020
Ethics approval and consent to participate
: This retrospective study was approved by the institutional review board of our hospital (B-1906/547–104), and informed consent was waived owing to the retrospective nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.
