Kim, Myoung Hwa
Kim, Dong Wook
Park, Seho
Kim, Joo Heung
Lee, Ki Young
Hwang, Jisung
Yoo, Young Chul https://orcid.org/0000-0002-6334-7541
Article History
Received: 15 May 2018
Accepted: 12 March 2019
First Online: 20 March 2019
Ethics approval and consent to participate
: Our protocol was approved by the Institutional Review Board and Hospital Research Ethics Committee of Severance Hospital, Yonsei University Health System (4-2017-0677). The board waived the requirement for informed consents because this study was retrospective.
: Not applicable
: The authors declare that they have no competing interests.
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