[1] Univ Wisconsin, Sch Vet Med, Dept Pathobiol Sci, Madison, WI 53711 USA
[2] Japan Sci & Technol Agcy, ERATO Infect Induced Host Responses Project, Saitama 3320012, Japan
[3] Univ Cambridge, Dept Vet Med, Cambridge CB3 0ES, England
[4] Natl Inst Infect Dis, Dept Pathol, Shinjuku Ku, Tokyo 1628640, Japan
[5] Scripps Res Inst, Dept Cell & Mol Biol, La Jolla, CA 92037 USA
[6] Univ Cambridge, Dept Zool, Cambridge CB2 3EJ, England
[7] Miyazaki Univ, Dept Vet Sci, Lab Vet Microbiol, Miyazaki 8892192, Japan
[8] Iwate Univ, Fac Agr, Dept Vet Med, Morioka, Iwate 0208550, Japan
[9] Natl Inst Infect Dis, Influenza Virus Res Ctr, Tokyo 2080011, Japan
[10] Univ Tokyo, Inst Med Sci, Dept Microbiol & Immunol, Div Virol, Tokyo 1088639, Japan
[11] Univ Tokyo, Inst Med Sci, Int Res Ctr Infect Dis, Dept Special Pathogens, Tokyo 1088639, Japan