Compliance with Ethical Standards

JB Jeong Woo Bae
ML Min Woo Lee
TK Tae Wook Kang
KS Kyoung Doo Song
DC Dong Ik Cha
JM Ji Hye Min
HR Hyunchul Rhim
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The institutional review board (IRB) of the Samsung Medical Center approved this retrospective study (IRB # 2020-08-084), and the requirement for informed consent was waived.

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