1. Division of Bacteriology; Department of Infectious Diseases Control; International Research Center for Infectious Diseases; Institute of Medical Science; The University of Tokyo; Tokyo 108-8639 Japan
2. Medical Proteomics Laboratory; Institute of Medical Science; The University of Tokyo; Tokyo 108-8639 Japan
3. Division of Mucosal Immunology; Institute of Medical Science; The University of Tokyo; Tokyo 108-8639 Japan
4. Department of Infection Microbiology; Research Institute for Microbial Diseases; Osaka University; Osaka 565-0871 Japan