Received: 21 July 2020
Accepted: 22 November 2020
First Online: 2 December 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of <i>Inha</i> University Hospital (<i>IRB</i> No.: <i>2019–06-009</i>), which waived the need for informed consent. The data was completely anonymous with no personal information being collected. The access to raw data was granted by JSL.
: Not applicable.
: All authors declare that they have no competing interests.