1. National Research Centre for the Working Environment Copenhagen Denmark
2. Division of Occupational and Environmental Medicine Duke University Medical School Durham North Carolina USA
3. Department of Occupational Medicine—University Research Clinic Danish Ramazzini Centre, Goedstrup Hospital Herning Denmark
4. School of Public Health and Community Medicine Institute of Medicine, University of Gothenburg Gothenburg Sweden
5. Team Working Life Copenhagen Denmark
6. Institute for Work and Health Toronto Ontario Canada
7. Safety Science & Security Group Centre for Safety in Health Care Delft University of Technology Delft The Netherlands