1. IFT Institut für Therapieforschung , Munich 80804 , Germany
2. Psychology Department, College of Science, University of Arizona , Tucson, AZ 85721 , USA
3. Institute of Psychology, ELTE Eötvös Loránd University , Budapest 1075 , Hungary
4. Department of Public Health Sciences , Centre for Social Research on Alcohol and Drugs, , Stockholm 10691 , Sweden
5. Stockholm University , Centre for Social Research on Alcohol and Drugs, , Stockholm 10691 , Sweden