1. University of Minnesota, School of Public Health, Minneapolis, Minnesota, USA
2. Emory University, Rollins School of Public Health, Atlanta, Georgia, USA
3. University of Minnesota, School of Medicine, Minneapolis, Minnesota, USA
4. The Dow Chemical Company, Midland, Michigan, USA
5. Monsanto Company, St. Louis, Missouri, USA
6. Amgen, Thousand Oaks, California, USA