1. Microbial Food Safety Research Unit, Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 600 E. Mermaid Lane; Wyndmoor PA 19038
2. American Air Liquide, Delaware Research & Technology Center, 200 GBC Drive; Newark DE 19702-2462
3. Department of Food Science; University of Massachusetts; Amherst MA 01003-1021