1. Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
2. Public Health Science Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
3. Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, Washington, USA
4. Department of Laboratory Medicine, University of Washington, Seattle, Washington, USA
5. Department of Medicine, University of Washington, Seattle, Washington, USA
6. Department of Microbiology, University of Washington, Seattle, Washington, USA