Funding for this research was provided by:
National IT Industry Promotion Agency (R-20190315-004075)
Hallym University (2019)
Article History
First Online: 2 January 2020
Conflict of interest
: All authors have no financial conflicts of interest.
: This study was approved by the hospital institutional review board (No. 2016-3, 2017-9 and 2018-6).
: Informed consent was received from patients or their relatives.