Article History
Received: 24 November 2019
Accepted: 9 July 2020
First Online: 21 July 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board (B-1901/514–115) of Seoul National University Bundang Hospital, which waived the requirement for obtaining informed patient consent.
: Not applicable.
: The authors declare that they have no competing interests.