1. Department of Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Sweden, Centre for Research in Migration and Ethnic Relations, Stockholm University, Sweden,
2. Department of Public Health, University of Helsinki, Finland, Department of Mental Health & Alcohol Research, National Public Health Institute, Finland
3. Centre for Research in Migration and Ethnic Relations, Stockholm University, Sweden
4. Department of Public Health, University of Turku, Finland
5. Department of Medicine, University of Turku, Finland
6. Department of Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Sweden