1. Department of Epidemiology, School of Public Health and Community Medicine, University of Washington, Seattle, Washington, USA
2. Cancer Prevention Program, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
3. Department of Civil and Environmental Engineering, College of Engineering, University of Washington, Seattle, Washington, USA
4. Department of Laboratory Medicine
5. Department of Medicine, School of Medicine, University of Washington, Seattle, Washington, USA
6. Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA