1. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
2. Center for Drug Safety and Effectiveness, Johns Hopkins University, Baltimore, Maryland, USA
3. Division of Infectious Diseases, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
4. Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
5. Armstrong Institute of Patient Safety and Quality, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
6. Division of Infectious Diseases, Johns Hopkins Bayview Medical Center, Baltimore, Maryland, USA