1 National Research Centre for the Working Environment (NRCWE), Copenhagen, Denmark.
2 Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark.
3 Epidemiology Unit, Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia.
4 Prevention Research Collaboration, School of Public Health, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia.