Funding for this research was provided by:
National Research Foundation of Korea (2019R1H1A1035599, 2017R1C1B2011637)
Korea Health Industry Development Institute (HI18C1623)
Received: 12 June 2020
Accepted: 21 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: The study was approved by the institutional review board of Chuncheon Sacred Heart Hospital.
: Not applicable.
: The authors declare that they have no competing interests.