1. Division of Infectious Disease, Department of Internal Medicine, Incheon Medical Center, Incheon, Korea.
2. Infection Control Office, Incheon Medical Center, Incheon, Korea.
3. Designated Isolation Unit, Incheon Medical Center, Incheon, Korea.
4. Division of High-Risk Pathogens, Bureau of Infectious Disease Diagnosis Control, Korea Disease Control and Prevention Agency, Cheongju, Korea.
5. Division of Bacterial Diseases, Bureau of Infectious Disease Diagnosis Control, Korea Disease Control and Prevention Agency, Cheongju, Korea.