Funding for this research was provided by:
National Research Foundation of Korea (NRF-2019R1F1A1043950)
Article History
Received: 30 July 2020
Accepted: 10 November 2020
First Online: 23 November 2020
Ethics approval and consent to participate
: This study was approved by Dongguk University Ilsan Hospital Institutional Review Board (Approval No. 2019–07–010-002) and written informed consent was obtained from all individual participants included in the study.
: Not applicable.
: All authors state no conflict of interest.