Park, Hye Jung
Byun, Min Kwang
Rhee, Chin Kook
Kim, Kyungjoo
Kim, Hyung Jung
Yoo, Kwang-Ha
Article History
Received: 12 June 2018
Accepted: 18 September 2018
First Online: 24 September 2018
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Gangnam Severance Hospital (number: 3–2017-0395). The requirement for obtaining informed consent from the patients was waived due to the retrospective nature of this study.
: Not applicable.
: All authors declare that they have no competing interests.
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