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Authors
Bae, Soo Ya
Jeon, Jae Wan
Kim, Seong Hoon
Baek, Chung Hee
Jang, Jai Won
Yang, Won Seok
Kim, Soon Bae
Park, Su-Kil
Lee, Sang Koo
Kim, Hyosang https://orcid.org/0000-0001-8140-9534
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Article History
Received: 18 March 2019
Accepted: 25 July 2019
First Online: 2 August 2019
Ethics approval and consent to participate
: The study was approved by the institutional review board of Asan Medical Center. Informed consent was not required, given the retrospective observational study design.
: Not applicable.
: The authors declare that they have no competing interests.
