1. Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin, USA
2. Department of Microbiology and Molecular Genetics, Oklahoma State University, Stillwater, Oklahoma, USA
3. Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
4. Microbiology Doctoral Training Program, University of Wisconsin-Madison, Madison, Wisconsin, USA
5. Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
6. David Braley Centre for Antibiotic Discovery, Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada