1. Addiction Center and Department of Psychiatry, School of Medicine, University of Michigan, Ann Arbor, Michigan, USA
2. Injury Prevention Center, School of Medicine, University of Michigan, Ann Arbor, Michigan, USA
3. Department of Health Behavior and Health Education, University of Michigan School of Public Health, Ann Arbor, Michigan, USA
4. Department of Sociology, University of Michigan, Ann Arbor, Michigan, USA
5. Behavioral Pharmacology Research Unit, Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, Maryland, USA