Funding for this research was provided by:
Ministry of Education (No.2017R1D1A1B03029113)
Soonchunhyang University (Not applicable)
Received: 8 May 2020
Accepted: 4 August 2020
First Online: 13 August 2020
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Review Board of SMG-SNU Boramae Medical Center (Registration number: 30–2018-10). The requirement for informed consent was waived in view of the retrospective nature of the study.
: Not applicable.
: No benefits in any form have been received or will be received from a commercial party related directly or indirectly to the subject of this article.