1. Division of Infectious Diseases & International Health, Department of Medicine, University of Virginia School of Medicine, Charlottesville, Virginia, USA
2. University of Virginia McIntire School of Commerce, Charlottesville, Virginia, USA
3. Clinical Microbiology Laboratory, Department of Pathology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
4. Office of Hospital Epidemiology/Infection Prevention & Control, UVA Health, Charlottesville, Virginia, USA