1. Department of Infectious Diseases, Ajou University School of Medicine, Suwon, Korea
2. Department of Internal Medicine, Inje University Ilsan Paik Hospital, Goyang, Korea
3. Office for Infection Control, Asan Medical Center, Seoul, Korea
4. Infection Control Office, Boramae Medical Center, Seoul, Korea
5. Department of infection control, Severance Hospital, Seoul, Korea
6. Division of Infectious Diseases, Seoul National University Bundang Hospital, Seongnam, Korea
7. Infection Control Team, Soonchunhyang University Seoul Hospital, Seoul, Korea
8. Department of Internal Medicine, Soonchunhyang University College of Medicine, Seoul, Korea
9. Department of Laboratory Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
10. Department of Laboratory Medicine, Konkuk University School of Medicine, Seoul, Korea
11. Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
12. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
13. Department of Nursing, College of Nursing Gachon University, Incheon, Korea
14. Infection Control Office, Inje University Sanggye Paik Hospital, Seoul, Korea
15. Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
16. Division of Infectious Diseases, Department of Internal Medicine, Kyung Hee University College of Medicine, Seoul, Korea
17. Office of Infection Control, Gangnam Severance Hospital, Seoul, Korea
18. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
19. Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea