1. Department of Public Health, Aarhus University, Denmark
2. Research Centre for Youth and Employment, Regional Hospital West Jutland, University Research Clinic, Denmark
3. NORCE, Norwegian Research Centre, Norway
4. Department of Occupational Medicine, Danish Ramazzini Centre, University Research Clinic, Regional Hospital West Jutland, Denmark
5. National Centre for Register-based Research, Aarhus University, Aarhus, Denmark
6. Department of Public Health, University of Copenhagen, Denmark
7. Centre for Social Medicine, Frederiksberg and Bispebjerg Hospital, Denmark