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Authors
Oh, Tak Kyu
Song, In-Ae
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Article History
Received: 28 December 2020
Accepted: 20 October 2021
First Online: 26 October 2021
Declarations
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: The study protocol was approved by the Institutional Review Board of Seoul National University Bundang Hospital (X-1908-556-901) and the Health Insurance Review and Assessment Service (NHIS-2019-1-505). This study was conducted in accordance with the guidelines of the Declaration of Helsinki. The requirement for informed consent was waived because the data analyses were performed retrospectively using anonymous data derived from the South Korean National Health Insurance Service (NHIS) database.
: Not applicable.
: The authors declare that they have no competing interests.
