1. 1Center for Food Safety, University of Georgia, Griffin, Georgia 30223, USA
2. 2Consumer Rights Protection Society, Moscow, Russia 125284
3. 3All-Russian State Center for Quality and Standardization of Veterinary Drugs and Feed, Moscow, Russia 123022
4. 4Leningrad Interregional Veterinary Laboratory, St. Petersburg, Russia 196158
5. 5U.S. Department of Agriculture, National Institute of Food and Agriculture, Washington, DC 20250, USA