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Authors
Yoo, Hongseok
Jeong, Byeong-Ho
Chung, Myung Jin
Lee, Kyung Soo
Kwon, O. Jung
Chung, Man Pyo http://orcid.org/0000-0002-5548-0764
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Article History
Received: 31 March 2019
Accepted: 25 July 2019
First Online: 14 August 2019
Ethics approval and consent to participate
: The Institutional Review Board of Samsung Medical Center approved the collection, analysis, and publication of the data. Informed consent was waived due to the retrospective nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.
