1. Korea Center for Disease Control and Prevention, Osong, Chungbuk, Republic of Korea;
2. 5th Medical Detachment, 168th Multifunctional Medical Battalion, 65th Medical Brigade, Unit 15247, USAG Yongsan, Seoul, Korea;
3. Medical Department Activity-Korea/65th Medical Brigade, Unit 15281, USAG Yongsan, Seoul, Korea;
4. Seoul Metropolitan Government Research Institute of Public Health and Environment, Seochogu, Seoul, Republic of Korea;
5. Gangwon Institute of Health and Environment, Shinbuk, Gangwon, Republic of Korea;
6. Incheon Institute of Health and Environment, Joonggu, Incheon, Republic of Korea