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Authors
Kim, Yoo-Mi
Choi, Jin-Ho
Lee, Beom-Hee
Kim, Gu-Hwan
Kim, Kyung-Mo
Yoo, Han-Wook https://orcid.org/0000-0001-8615-186X
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Article History
Received: 5 November 2019
Accepted: 28 January 2020
First Online: 11 February 2020
Ethics approval and consent to participate
: Written informed consents were obtained from patients and the parents of each patient, and this study was approved by the Research Ethics Board at the Asan Medical Center (approval number: S2019–1025-0001).
: Not applicable.
: The authors declare that they have no competing interests.
