Funding for this research was provided by:
National Research Foundation of Korea (NRF-2019R1A2C1007203)
Received: 25 May 2020
Accepted: 20 July 2020
First Online: 29 July 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of the Korean National Institute of Health for the KoGES (KBP-2015-055) and Hoseo University (1041231–150811-HR-034-01). The procedures were compliant with the Declaration of Helsinki and the ethical standards of the responsible committee on human experimentation. Written informed consent was obtained from all participants.
: Not applicable.
: All authors declare no conflicts of interest.