Received: 11 November 2020
Accepted: 9 February 2021
First Online: 18 February 2021
Ethics approval and consent to participate
: This study was approved by the independent Institutional Review Board of Kosin University Gospel Hospital (KUGH 2017–11–026) and conducted in accordance with the Declaration of Helsinki. This study was exempted from the requirement for informed patient consent because personal information was protected and kept anonymous.
: Not applicable.
: There are no potential competing interests relevant to this article to report.Financial disclosure statements: All authors have nothing to declare.