1. Division of Microbiology, Arkansas Regional Laboratory; U.S. Food and Drug Administration; Jefferson; AR; 72079; USA
2. Division of Genetic and Molecular Toxicology, National Center for Toxicological Research; U.S. Food and Drug Administration; Jefferson; AR; 72079; USA
3. Nanotechnology Facility, National Center for Toxicological Research; U.S. Food and Drug Administration; AR; 72079; USA
4. Nanotechnology Center, Applied Science Department; University of Arkansas at Little Rock; Little Rock; AR; 72211; USA
5. Center for Food Safety and Applied Nutrition; U.S. Food and Drug Administration; College Park; MD; 20740; USA
6. Center for Veterinary Medicine; U.S. Food and Drug Administration; Rockville; MD; 20855; USA