[1] Osaka Univ, Lab Immunochem, WPI Immunol Frontier Res Ctr, Suita, Osaka 5650871, Japan
[2] Osaka Univ, Dept Immunochem, Microbial Dis Res Inst, Suita, Osaka 5650871, Japan
[3] Northwestern Univ, Dept Microbiol Immunol, Feinberg Sch Med, Chicago, IL 60611 USA
[4] Univ Tokyo, Dept Infect Dis Control, Int Res Ctr Infect Dis, Inst Med Sci,Minato Ku, Tokyo 1088639, Japan
[5] Univ Calif San Francisco, Dept Microbiol & Immunol, San Francisco, CA 94143 USA
[6] Univ Calif San Francisco, Canc Res Inst, San Francisco, CA 94143 USA