Funding for this research was provided by:
National Research Foundation of Korea (2016R1A2B3012850)
Received: 8 December 2019
Accepted: 30 April 2020
First Online: 8 May 2020
Ethics approval and consent to participate
: This study was approved by the institutional review board of Seoul National University Bundang Hospital, and all participants provided written informed consent.
: Not applicable.
: The authors declare no competing interests.