1 Division of Infectious Diseases, Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina.
2 Division of Infectious Diseases, University of North Carolina, Chapel Hill, North Carolina.
3 Hospital Epidemiology, University of North Carolina Health, Chapel Hill, North Carolina.
4 Division of Infectious Diseases, Duke Center for Antimicrobial Stewardship and Infection Prevention, Duke University Medical Center, Durham, North Carolina.