1 Nutritional Sciences Program, School of Public Health, University of Washington, Seattle, WA, USA. dpahwa@uw.edu.
2 Nutritional Sciences Program, Department of Epidemiology, School of Public Health, University of Washington, Seattle, WA, USA.
3 John Glenn College of Public Affairs, Ohio State University, Columbus, OH, USA.
4 Centre for Food Policy, School of Health and Psychological Sciences, University of London, London, UK.
5 Nutritional Sciences Program, Department of Occupational and Environmental Health Sciences, School of Public Health, University of Washington, Seattle, WA, USA.