1. DEFACTUM, Central Denmark Region, 8000 Aarhus, Denmark
2. Department of Public Health, Aarhus University, 8000 Aarhus, Denmark
3. Faculty of Education, Monash University, Clayton, VIC 3800, Australia
4. Centre for International Research on Education Systems, Mitchell Institute, Victoria University, Melbourne, VIC 8001, Australia
5. Department of Economics and Business Economics, Aarhus University, 8000 Aarhus, Denmark
6. Department of Clinical Research, University of Southern Denmark, 5230 Odense, Denmark