Received: 14 June 2021
Accepted: 9 September 2021
First Online: 25 September 2021
: This study was conducted ethically in accordance with the World Medical Association Declaration of Helsinki. The study protocol received a determination of exemption after review by the Institutional Review Board of Seoul National University Hospital (IRB No. 1906-048-1038).
: Not applicable.
: The authors have no competing interest to declare.