1. Laboratory of Clinical Investigation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md., and Department of Veterinary Pathology, College of Veterinary Medicine, Washington State University, Pullman, Wash.
2. National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md.
3. Inflammatory Diseases Section, Laboratory of Clinical Investigation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md.
4. Washington State University, Pullman, Wash.