1. National Institutes of Health, National Institute of Allergy and Infectious Diseases, Integrated Research Facility at Fort Detrick, Fort Detrick, Frederick, Maryland, United States
2. Frederick National Laboratory for Cancer Research, Clinical Monitoring Research Program Directorate, Frederick, Maryland, United States
3. National Institutes of Health, Center for Infectious Disease Imaging, Radiology and Imaging Sciences, Clinical Center, Bethesda, Maryland, United States
4. University of Wisconsin–Madison, Department of Pathobiological Sciences, School of Veterinary Medicine, Madison, Wisconsin, United States
5. University of Wisconsin–Madison, Department of Pathology and Laboratory Medicine, Madison, Wisconsin, United States