1. Department of Food Science, University of Missouri, Columbia MO 65211
2. Veterinary Medical Diagnostic Laboratory, University of Missouri, Columbia MO 65211
3. Departments of Biochemistry, Animal Sciences and Child Health, University of Missouri, Columbia MO 65211
4. Department of Surgical Oncology, University of Illinois, Chicago, IL 60612
5. Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI 48824-1224.