1 Department of Public Health Sciences, Stockholm University and Centre for Health Equity Studies (CHESS), Stockholm University/Karolinska Institutet, Stockholm, Sweden.
2 Finnish Institute of Occupational Health, Turku, Finland.
3 Faculty of Social Sciences, School of Health Sciences, University of Tampere, Tampere, Finland.
4 School of Social Sciences and Humanities, University of Tampere, Tampere, Finland.
5 Department of Epidemiology and Public Health, University College London Medical School, London, United Kingdom.
6 Department of Public Health, University of Turku, Turku, Finland.
7 Turku University Hospital, University of Turku, Turku, Finland.