Funding for this research was provided by:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT and Future Planning (NRF-2017R1A2B4006015, and NRF-2018R1A2B2006820)
Received: 15 May 2019
Accepted: 25 November 2019
First Online: 12 December 2019
Ethics approval and consent to participate
: This study was conducted in accordance with the Declaration of Helsinki and approved by the Institutional Review Board for Human Research, Konkuk University Hospital (KUH1010186).
: Informed consent was obtained from all patients.
: The authors declare that they have no competing interests.