Funding for this research was provided by:
Korea Centers for Disease Control and Prevention (2017E5400300)
Internal Research Program from the Armed Forces Medical Research Institute (17-internal-7)
Received: 20 June 2020
Accepted: 25 August 2020
First Online: 1 September 2020
Ethics approval and consent to participate
: This study was approved by the ethics committee of the Armed Forces Medical Command (AFMC) of the ROK (Approval No. AFMC-17-IRB-023). Written informed consent was obtained from each participant.
: Not applicable.
: The authors declare that they have no competing interests.