1. Clinical Psychoneuroendocrinology and Neuropsychopharmacology Section, Translational Addiction Medicine Branch National Institute on Drug Abuse Intramural Research Program and National Institute on Alcohol Abuse and Alcoholism Division of Intramural Clinical and Biological Research, National Institutes of Health Baltimore and Bethesda Maryland USA
2. Center on Compulsive Behaviors, Intramural Research Program National Institutes of Health Bethesda Maryland USA
3. Departments of Psychology and Psychiatry University of California, Los Angeles Los Angeles California USA
4. Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences Brown University Providence Rhode Island USA
5. Division of Addiction Medicine, Department of Medicine, School of Medicine Johns Hopkins University Baltimore Maryland USA
6. Department of Neuroscience Georgetown University Medical Center Washington DC USA