1. Department of Population Health, New York University Grossman School of Medicine, New York
2. Department of Psychiatry, Yale School of Medicine, New Haven, Connecticut
3. Office of National Drug Control Policy, Washington-Baltimore High Intensity Drug Trafficking Areas Program, Baltimore, Maryland
4. College of Public Affairs, Center for Drug Policy and Prevention, University of Baltimore, Baltimore, Maryland
5. Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York
6. Department of Epidemiology, College of Public Health and Health Professions, College of Medicine National Drug Early Warning System, University of Florida, Gainesville