1 National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark. [email protected].
2 National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark.
3 MRC/CSO Social and Public Health Sciences Unit, University of Glasgow, Glasgow, UK and Department of Epidemiology, Columbia University, New York, NY, USA.
4 Research Centre for Prevention and Health, The Capital Region of Denmark, Glostrup, Denmark.