1. Department of Nursing and The Johns Hopkins Hospital, Baltimore, Maryland, USA.
2. Department of Medicine, The Johns Hopkins Hospital, Baltimore, Maryland, USA.
3. Hospital Epidemiology and Infection Control, The Johns Hopkins Hospital, Baltimore, Maryland, USA.
4. Division of Infectious Diseases, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA.
5. Facilities Management, Johns Hopkins Health System, Baltimore, Maryland, USA.
6. Division of Pulmonary and Critical Care Medicine, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA.