Funding for this research was provided by:
National Research Foundation of Korea (NRF-2017R1C1B5076976)
Received: 26 July 2020
Accepted: 3 February 2021
First Online: 19 February 2021
Ethics approval and consent to participate
: All research activities were reviewed and approved by Kangwon National University Hospital Institutional Review Board (approval number, KNUH-A-2017-11-005-003). Written informed consent was obtained from participants prior to study commencement.
: Not applicable.
: No conflict of interest to declare.