1. Department of Mental Health, Bloomberg School of Public Health, The Johns Hopkins University, Baltimore, Maryland
2. Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles
3. Center for Social Epidemiology and Population Health, Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor
4. Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, Maryland
5. Institute for Addiction Science, Keck School of Medicine, University of Southern California, Los Angeles
6. Department of Psychology, University of Southern California, Los Angeles