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Authors
Yi, You Gyoung https://orcid.org/0000-0003-1791-1831
Oh, Byung-Mo https://orcid.org/0000-0001-9353-7541
Shin, Seung Han
Shin, Jin Yong
Kim, Ee-Kyung https://orcid.org/0000-0002-7063-168X
Shin, Hyung-Ik https://orcid.org/0000-0001-8805-3104
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Article History
Received: 17 September 2019
Accepted: 29 October 2019
First Online: 14 November 2019
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Ethical approval was obtained from the Seoul National University Hospital Institutional Review Board (IRB no. 1711–128-901). Patient consent was not required as we used routinely collected data.
: Not applicable.
: All authors declare that they have no competing interests.
