Funding for this research was provided by:
Ministry of Science, ICT and Future Planning (NRF-2017R1C1B2010379)
Received: 10 May 2020
Accepted: 13 July 2020
First Online: 31 July 2020
Ethics approval and consent to participate
: This study was approved by the Health Institutional Review Boards of Yonsei University Hospital (No.4–2019-0009). The requirement for informed consent was waived because of the retrospective nature of this study.
: Not applicable.
: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.