Funding for this research was provided by:
National Research Foundation of Korea (NRF-2016R1A5A1010764)
Received: 16 April 2020
Accepted: 8 June 2020
First Online: 13 June 2020
Ethics approval and consent to participate
: This study complied with the Declaration of Helsinki and was approved by the Ethics Committee of the Yonsei University College of Medicine (4-2019-0270). All participants provided written informed consent in this study.
: Not applicable.
: The authors declare that they have no competing interests.