1. Peter Boris Centre for Addictions Research St Joseph's Healthcare Hamilton Hamilton ON Canada
2. Addictive Behaviors Research Group, Department of Psychology University of Oviedo Oviedo Spain
3. Department of Psychology and Sociology University of Zaragoza Teruel Spain
4. Center for Alcohol and Addiction Studies Brown University School of Public Health Providence RI USA
5. Providence VA Medical Center Providence RI USA
6. Department of Psychology The University of Memphis Memphis TN USA