1. Department of Epidemiology, George Washington Milken Institute of Public Health , Washington, DC , USA
2. Department of Health Policy, Virginia Commonwealth University, School of Medicine , Richmond, Virginia , USA
3. Division of Infectious Diseases, Children's National Hospital , Washington DC , USA
4. Antibiotic Resistance Action Center, Department of Environmental and Occupational Health, George Washington Milken Institute of Public Health , Washington, DC , USA
5. Department of Clinical Care and Research, Included Health , San Francisco, California , USA
6. Department of Pediatrics, George Washington University, School of Medicine and Health Sciences , Washington, DC , USA