1. U.S. Department of Health and Human Services, Centers for Disease Control and Prevention (CDC), Division of Foodborne, Waterborne, and Environmental Diseases, Atlanta, Georgia.
2. U.S. Department of Health and Human Services, Food and Drug Administration (FDA), College Park, Maryland.
3. U.S. Department of Agriculture, Food Safety and Inspection Service (USDA-FSIS), Washington, District of Columbia.
4. Arnold School of Public Health, University of South Carolina, Columbia, South Carolina.
5. U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Fort Collins, Colorado.