1. Food Science Institute Kansas State University Manhattan KS 66506 U.S.A.
2. USDA Eastern Regional Research Center Wyndmoor PA 19038 U.S.A.
3. U.S. Food and Drug Administration Veterinary Laboratory Investigation and Response Network Laurel MD 20708 U.S.A.
4. Animal Sciences and Industry Kansas State University Manhattan KS 66506 U.S.A.