Funding for this research was provided by:
Research Resettlement Fund for the new faculty of Seoul National University
the Bio & Medical Technology Development Program of the National Research Foundation of Korea (NRF) funded by the Korean government (NRF-2014M3A9E1069992)
Received: 26 August 2020
Accepted: 27 January 2021
First Online: 16 February 2021
: Samples were collected from healthy volunteers with informed consents following the procedures approved by the Institutional Review Board of Severance Hospital, Yonsei University in Korea.
: Not applicable
: The authors declare no competing interests.