1. Department of Public Health Sciences, Stockholm University, Stockholm, Sweden;
2. Centre for Health Equity Studies, Stockholm University/Karolinska Institutet, Stockholm, Sweden;
3. Karolinska Institutet, Stockholm, Sweden;
4. Department of Public Health, Danish Research Centre for Migration, Ethnicity and Health, University of Copenhagen, Copenhagen, Denmark;
5. Department of Medicine, Clinical Epidemiology, Karolinska Institutet, Stockholm, Sweden