1. Department of Pathobiological Sciences, University of Wisconsin—Madison, Madison, Wisconsin, USA
2. Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin, USA
3. Department of Veterinary and Biomedical Sciences, University of Minnesota, Twin Cities, St. Paul, Minnesota, USA
4. Department of Comparative Biosciences, University of Wisconsin-—Madison, Madison, Wisconsin, USA
5. Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin, USA
6. Department of Biostatistics and Medical Informatics, University of Wisconsin—Madison, Madison, Wisconsin, USA
7. Department of Pediatrics, University of Wisconsin—Madison, Madison, Wisconsin, USA
8. Department of Obstetrics and Gynecology, University of Wisconsin—Madison, Madison, Wisconsin, USA
9. Department of Pathology, Oregon Health and Science University, Portland, Oregon, USA
10. Department of Obstetrics and Gynecology, Oregon Health and Science University, Portland, Oregon, USA
11. U.S. Army Medical Research Institute of Infectious Diseases, Fort Detrick, Maryland, USA