Funding for this research was provided by:
National Research Foundation of Korea (2019M3E5D1A02068142)
Received: 12 July 2020
Accepted: 27 November 2020
First Online: 9 December 2020
Ethics approval and consent to participate
: All participants in this study were anonymized. The use of data from the hospital database for the analysis was approved by the institutional review board (Yeungnam University Hospital, 2020-06-091). Written informed consent was waived due to retrospective study design.
: Not applicable.
: The authors declare that they have no competing interests.