Funding for this research was provided by:
Hallym University Medical Center (HURF-2019-19)
Received: 20 January 2020
Accepted: 26 May 2020
First Online: 5 June 2020
Ethics approval and consent to participate
: Ethics approval was provided by the Institutional Review Board of Kangdong Sacred Heart Hospital (IRB No 2019–04-003). The requirement for informed consent was waived because this study was a retrospective medical chart review study with no personal information for each participant.
: Not applicable.
: The authors have disclosed no conflicts of interest.