1. Department for Biostatistics and Clinical Epidemiology Charité - University Medicine Berlin, Germany Center for Stroke Research Charité - University Medicine Berlin, Germany
2. Department of Sociology Stockholm University
3. Department of Alcohol, Drugs and Addiction National Institute for Health and Welfare (THL), Helsinki
4. Centre for Social Research on Alcohol and Drugs (SoRAD) Stockholm University, Stockholm Stockholm Prevents Alcohol and Drug Problems (STAD) Centre for Dependency Disorders, Stockholm County Council
5. Norwegian Institute for Alcohol and Drug Research (SIRUS)
6. Department for Biostatistics and Clinical Epidemiology Charité - University Medicine, Berlin Center for Alcohol and Drug Research Aarhus University, Copenhagen Division, Copenhagen