1. Department of Microbiology, Immunology and Pathology, and Laboratory Animal Resources, Colorado State University, Fort Collins, Colorado
2. Laboratory Animal Resources, Colorado State University, Fort Collins, Colorado
3. Animal Resources Program, University of Alabama, Birmingham, Alabama
4. Comparative Medicine Training Program, Colorado State University, Fort Collins, Colorado
5. Animal Resource Center, University of Texas Medical Branch, Galveston, Texas
6. Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado
7. Department of Veterinary Pathobiology, University of Missouri, Columbia, Missouri
8. Office of Animal Resources, University of Iowa, Iowa City, Iowa