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Authors
Seo, Wonju
Lee, You-Bin
Lee, Seunghyun
Jin, Sang-Man
Park, Sung-Min https://orcid.org/0000-0002-8359-8110
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Article History
Received: 12 February 2019
Accepted: 21 October 2019
First Online: 6 November 2019
Ethics approval and consent to participate
: The protocol of this study was approved by the Institutional Review Board (IRB) of the Samsung Medical Center. The informed consent requirement for this study was waived because the researcher only accessed the database for analysis purposes, and all patient data were de-identified (IRB file number; SMC 2016-05-058-001) All medical procedures were performed in accordance with relevant guidelines and regulations. The informed consent requirement for this study was waived by the board because the researcher only accessed the database for analysis purposes, and all patient data were de-identified.
: Not applicable.
: The authors declare that they have no competing interests.
