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Authors
Yoon, Shin Ae
Chang, Yun Sil
Ahn, So Yoon
In Sung, Se
Park, Won Soon
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Article History
Received: 6 November 2018
Accepted: 20 September 2019
First Online: 11 October 2019
Ethics approval and consent to participate
: Data collection was approved by the Institutional Review Board of Samsung Medical Center.The informed consent requirements for this retrospective chart review were waived by the Institutional Review Board.
: Not applicable.
: The authors declare that they have no competing interests.
