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Authors
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Funding
Funding for this research was provided by:
Ministry of Science, ICT and Future Planning (NRF-2019R1F1A1060131)
Seoul National University Hospital (No. 03-2019-0070)
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Article History
Received: 24 April 2020
Revised: 7 June 2020
Accepted: 13 June 2020
First Online: 19 June 2020
Compliance with ethical standards
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: The authors declare that they have no conflict of interest.
: This retrospective study was approved by the Institutional Review Board of Seoul National University Hospital. 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. For this type of study formal consent is not required.
: The Institutional Review Board of Seoul National University Hospital approved this retrospective study and waived the requirement for patients’ informed consent.
