1. Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, PA 19104, USA.
2. Laboratory of Virology, Division of Intramural Research, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Hamilton, MT 59840, USA.
3. Special Pathogens Program, University of Manitoba and Public Health Agency of Canada, Winnipeg, Manitoba R3E 3R2, Canada.
4. Inovio Pharmaceuticals Inc., Plymouth Meeting, PA 19462, USA.
5. Rocky Mountain Veterinary Branch, Division of Intramural Research, NIAID, NIH, Hamilton, MT 59840, USA.
6. Department of Microbiology, University of Washington, Seattle, WA 98195, USA.
7. Department of Molecular Medicine, University of South Florida Morsani College of Medicine, Tampa, FL 33612, USA.