1. Infection Control Office, Korea University Guro Hospital, Seoul, Korea
2. Department of Nursing Science, Sun Moon University, Asan, Korea
3. Department of Infection Control, Konyang University Hospital, Daejeon, Korea
4. Nationally-Designated Inpatient Treatment Unit, Seoul National University Hospital, Seoul, Korea
5. Infection Control Office, Inje University Sanggye Paik Hospital, Seoul, Korea
6. Office of Infection Control, Gangnam Severance Hospital, Seoul, Korea
7. College of Nursing, Keimyung University, Daegu, Korea
8. Infection Control Team, Chung-Ang University Hospital, Seoul, Korea
9. Infection Control Department, Dankook University Hospital, Cheonan, Korea
10. Institute of Geriatric Medicine, Incheon Eun-Hye Convalescent Hospital, Incheon, Korea
11. Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea