Article History
Received: 8 April 2020
Accepted: 29 July 2020
First Online: 8 August 2020
Ethics approval and consent to participate
: The study protocol was approved by the local Institutional Review Board of St. Paul’s Hospital, The Catholic University of Korea, and informed consent for involvement in the study was obtained from each participant.
: Not applicable.
: The authors declare that they have no competing interests.