Funding for this research was provided by:
Ministry of Education (NRF-2015R1D1A1A02061943)
Korea Centers for Disease Control and Prevention (A092076)
Received: 19 January 2021
Accepted: 2 June 2021
First Online: 4 June 2021
: The study was approved by the Ministry of Food and Drug Safety of the Republic of Korea (20160004728) and our institutional review boards (GBIRB2016-002, 3-2017-0307, 26-2017-45, B1707-409-401, and AJIRB-MED-CT1-17-098). The study was monitored by our human research protection committees and registered in an open-access trial registry (ClinicalTrials.gov identifier: NCT02665754). All subjects were enrolled after informed consent obtained.
: Not applicable.
: The authors declare that they have no competing interests.