Affiliation: | 1. Department of Microbiology and Immunology, University of Western Ontario, London, Ontario N6A 5C1, Canada;2. Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20014, USA;3. Department of Microbiology, University of California, San Francisco, California 94144, USA;4. Institute de Recherches, Cliniques de Montreal, 110 West Pine Avenue, Montreal, Quebec H2W 1R7, Canada;5. Department of Biology, Yale University, New Haven, Connecticut 16520, USA |