1. Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA.
2. Department of Global Health, University of Washington, Seattle, WA, USA.
3. Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA.
4. Centre de Recherche du CHUM, Montréal, QC, Canada.
5. Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montreal, QC, Canada.
6. Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada.
7. Department of Medicine, University of Washington, Seattle, WA, USA.