[1] Osaka Univ, Microbial Dis Res Inst, Dept Mucosal Immunol, Suita, Osaka 565, Japan
[2] Univ Alabama, Dept Oral Biol, Birmingham, AL 35294 USA
[3] Univ Alabama, Dept Microbiol, Birmingham, AL 35294 USA
[4] Univ Alabama, Immunobiol Vaccine Ctr, Birmingham, AL 35294 USA
[5] Univ Calif Davis, Calif Reg Primate Res Ctr, Davis, CA USA
[6] United Med & Dent Sch Guys & St Thomas Hosp, Guys Hosp, Dept Immunol, London, England
[7] Osaka Univ, Fac Dent, Dept Oral Microbiol, Osaka, Japan