1. Fred Hutchinson Cancer Research Center, Division of Public Health Sciences, Seattle, WA
2. Department of Family and Preventive Medicine, University of California San Diego, La Jolla, CA
3. Department of Public Health Sciences, Division of Epidemiology, School of Medicine, University of California Davis, Sacramento, CA
4. Kaiser Permanente Division of Research, Oakland, CA
5. Division of Preventive Medicine, University of Alabama at Birmingham, Birmingham, AL
6. Northwestern Comprehensive Center on Obesity, Northwestern University Feinberg School of Medicine, Chicago, IL