1. Division of Infectious Diseases, Department of Internal Medicine, Incheon Medical Center, Incheon, Korea.
2. Division of Infectious Diseases, Department of Internal Medicine, Guro Hospital, Korea University College of Medicine, Seoul, Korea.
3. Division of Infectious Diseases, Department of Internal Medicine, Anam Hospital, Korea University College of Medicine, Seoul, Korea.
4. Division of Infectious Diseases, Department of Internal Medicine, Seoul Hospital, Chung-Ang University College of Medicine, Seoul, Korea.
5. Division of Infectious Diseases, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
6. Department of Infection Control, Korea University Guro Hospital, Seoul, Korea.
7. Department of Infection Control, Ewha Womens University Mokdong Hospital, Seoul, Korea.
8. Keonyang University College of Nursing, Daejeon, Korea.
9. Department of Infection Control, Konkuk University Seoul Hospital, Seoul, Korea.
10. Catholic University of Korea College of Nursing, Seoul, Korea.
11. Division of Infectious Diseases, Department of Internal Medicine, Seoul Metropolitan Government Seobuk Hospital, Seoul, Korea.
12. Division of Infectious Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
13. Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University College of Medicine, Seoul, Korea.
14. Division of Infectious Diseases, Department of Internal Medicine, Ajou University School of Medicine, Suwon, Korea.
15. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
16. Division of Infectious Diseases, Department of Internal Medicine, Eulji University Hospital, Daejeon, Korea.
17. Division of Infectious Diseases, Department of Internal Medicine, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
18. Division of Infectious Diseases, Department of Internal Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
19. Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
20. Division of Infectious Diseases, Department of Internal Medicine, Kangwon National University School of Medicine, Chucheon, Korea.
21. Division of Infectious Diseases, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.