1. Department of Psychiatry and Human Behavior, Alpert Medical School, Brown University, Providence, Rhode Island
2. Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, School of Public Health, Brown University, Providence, Rhode Island
3. Department of Human Development and Family Studies, Purdue University, West Lafayette, Indiana
4. Behavioral Genetics of Addiction Laboratory, Department of Psychology, Emory University, Atlanta, Georgia