Affiliation: | 1. Department of Molecular Bacteriology and Immunology, Graduate School of Medicine, University of the Ryukyus, , Okinawa, 903‐0215 Japan;2. Australian Research Council Centre of Excellence in Structural and Functional Microbial Genomics, Department of Microbiology, Monash University, , Clayton, Vic., 3800 Australia;3. Department of Bacteriology I, National Institute of Infectious Diseases, , Tokyo, 162‐8640 Japan |