Funding for this research was provided by:
Government-wide R&D Fund project for infectious disease research (GFID), Republic of Korea (HG18C0046)
armed forces health surveillance branch (#P0131-20-ME-03)
Brain Korea 21 Plus (Brain Korea 21 Plus)
Received: 30 March 2021
Accepted: 27 July 2021
First Online: 6 August 2021
: No specific permits were required for this study. The study did not involve endangered or protected species. Therefore, the local ethics committee deemed that approval was unnecessary.
: All authors provided their consent for the publication of this report.
: The authors declare that they have no competing interests.