[1] Univ Tokushima, Inst Genome Res, Div Immune Regulat, Tokushima 770, Japan
[2] Kyoto Univ, Grad Sch Med, Dept Immunol & Genom Med, Kyoto, Japan
[3] Univ Occupat & Environm Hlth, Sch Med, Dept Mol Biol, Kitakyushu, Fukuoka 807, Japan
[4] RIKEN Yokohama Inst, Ctr Integrat Med Sci IMS RCAI, Lab Mucosal Immun, Yokohama, Kanagawa, Japan