1. College of Nursing, Konyang University1, Daejeon, Korea
2. Department of Nursing Science, Gangseo University, Seoul, Korea
3. Infection Control Team, Chung-Ang University Hospital, Seoul, Korea
4. Institute of Geriatric Medicine, Incheon Eun-Hye Convalescent Hospital, Incheon, Korea
5. Department of Nursing, Seoul Silverlight Convalescent Hospital, Seoul, Korea
6. The Infection Prevention and Control Team, Konyang University Hospital, Daejeon, Korea