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Authors
Kim, You Keun
Lee, Ho Seong
Ryu, Jae Jung
In Lee, Hye
Seo, Sang Gyo http://orcid.org/0000-0003-0145-4066
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Funding
Funding for this research was provided by:
National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2017R1C1B2010823)
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Article History
Received: 18 March 2018
Accepted: 5 June 2018
First Online: 19 June 2018
Ethics approval and consent to participate
: This retrospective study was approved by the institutional review board of the Asan Medical Center. (2017–1142).
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
