1. Department of Epidemiology, The Johns Hopkins Bloomberg School of Public Health
2. Department of Medicine, Division of Infectious Diseases, The Johns Hopkins University School of Medicine, Baltimore, Maryland
3. Division of Infectious Diseases, University Hospital Basel, Switzerland
4. Divisions of Infectious Diseases and Epidemiology, Hospital of the University of Pennsylvania, Philadelphia
5. Division of Pulmonary and Critical Care Medicine, The Johns Hopkins University School of Medicine
6. Department of Pharmacy, The Johns Hopkins Hospital
7. Division of Medical Microbiology, The Johns Hopkins University School of Medicine
8. Department of Pediatrics, Division of Infectious Diseases, The Johns Hopkins University School of Medicine, Baltimore, Maryland