1. U.S. Department of Agriculture, Agricultural Research Service, Food Safety Intervention Technologies Research Unit, Eastern Regional Research Center, Wyndmoor, Pennsylvania.
2. U.S. Department of Agriculture, Food Safety and Inspection Service, Washington, DC.
3. Residue Chemistry and Predictive Microbiology Research Unit, Eastern Regional Research Center, Wyndmoor, Pennsylvania.
4. U.S. Department of Agriculture, Agricultural Research Service, Egg Safety and Quality Research Unit, Richard B. Russell Agricultural Research Center, Athens, Georgia.