1. Department of Laboratory Medicine, University of Washington, Seattle
2. Department of Medicine, University of Washington, Seattle
3. Department of Viroscience, Erasmus Medical Center, Rotterdam, the Netherlands
4. Department of Global Health, University of Washington, Seattle
5. Vaccine and Infectious Diseases Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
6. Benaroya Research Institute, Seattle, Washington
7. Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine, Hannover, Germany