1. Center for Population Health IT, Department of Health Policy and Management, and Center for Drug Safety and Effectiveness, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.
2. Center for Drug Safety and Effectiveness and Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, and Center for Medication Quality and Outcome, Johns Hopkins Hospital, Baltimore, Maryland.
3. Center for Drug Safety and Effectiveness and Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.
4. Center for Population Health IT and Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.
5. Center for Population Health IT and Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, and Division of Health Sciences and Informatics, Johns Hopkins School of Medicine, Baltimore, Maryland.