1. Institute for Safe Medication Practices, Alexandria, Virginia
2. Department of Epidemiology and Biostatistics, Milken Institute of Public Health, George Washington University, Washington, DC
3. Center for Drug Safety and Effectiveness, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
4. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
5. Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
6. Division of General Internal Medicine, Johns Hopkins Medicine, Baltimore, Maryland