1. Gyeonggi Infectious Disease Control Center, Health Bureau, Gyeonggi Provincial Government, Suwon-si 16508, Gyeonggi-do, Republic of Korea
2. Center for Preventive Medicine and Public Health, Seoul National University Bundang Hospital, Seongnam-si 13620, Gyeonggi-do, Republic of Korea
3. Pyeongchang County Health and Medical Center, Pyeongchang-gun 25374, Gangwon-do, Republic of Korea
4. Department of Nursing, College of Medicine, SoonChunHyang University, Cheonan-si 31151, Chungcheongnam-do, Republic of Korea