1. Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin—Madison, 575 Science Drive, Madison, Wisconsin 53711
2. Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
3. Institute of Human Virology, University of Maryland School of Medicine, Baltimore, Maryland 21201
4. International Research Center for Infectious Diseases, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
5. ERATO Infection-Induced Host Responses Project, Japan Science and Technology Agency, Saitama 332-0012, Japan