1. Danish National Centre for Social Research, Herluf Trolles Gade 11, DK-2100 Copenhagen, Denmark, , PreSenter, International Research Institute of Stavanger (IRIS), Norway
2. National Research Centre for the Working Environment, Lerso Parkallé 105, DK-2100 Copenhagen, Denmark
3. Institute of Public Health, Faculty of Health Sciences, University of Copenhagen, Øster Farimagsgade 5 opg. B, Postboks 2099, DK-1014, Copenhagen, Denmark
4. University Medical Center Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
5. Danish National Centre for Social Research, Herluf Trolles Gade 11, DK-2100 Copenhagen, Denmark