1. Department of Health Systems and Population Health University at Washington Seattle Washington USA
2. National Institute for Occupational Safety and Health Centers for Disease Control and Prevention Cincinnati Ohio USA
3. Department of Rehabilitation Medicine University of Washington Seattle Washington USA
4. Department of Environmental and Occupational Health Sciences University of Washington Seattle Washington USA
5. Department of Medicine University of Washington Seattle Washington USA
6. Department of Neurology University of Washington Seattle Washington USA
7. Washington State Department of Labor and Industries Tumwater Washington USA