1. Department of Psychology at Emory University, Behavioral Genetics of Addiction Laboratory, Atlanta, GA, USA
2. Providence Veterans Affairs Medical Center, Providence, RI, USA
3. Department of Psychiatry and Human Behavior, Alpert Medical School, Brown University, Providence, RI, USA
4. Center for Alcohol and Addiction Studies, Brown University School of Public Health, Providence, RI, USA
5. Human Development and Family Studies, Purdue University, West Lafayette, IN, USA
6. Institute for Cognitive Science, University of Colorado at Boulder, Boulder, CO, USA