1. Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
2. Departments of Medicine, Pharmacology, Molecular Biology, and Microbiology, Medical Service and Center for Antimicrobial Resistance and Epidemiology, Louis Stokes Cleveland Veterans Affairs Medical Center, University Hospitals Cleveland Medical Center and Case Western Reserve University, Cleveland, Ohio, USA
3. Department of Pharmacy, The Johns Hopkins Hospital, Baltimore, Maryland, USA
4. Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
5. Departments of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA