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Authors
Yu, Jihion
Hong, Jun Hyuk
Park, Jun-Young
Hwang, Jai-Hyun
Cho, Seong-Sik
Kim, Young-Kug https://orcid.org/0000-0002-1982-3053
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Article History
Received: 29 January 2018
Accepted: 22 May 2018
First Online: 20 June 2018
Ethics approval and consent to participate
: The study protocol was approved by the Asan Medical Center Institutional Review Board (approval number: 2017–1011). Written informed consent was obtained from all patients.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
