1. Department of Life Science; Shokei University; Kumamoto Japan
2. Department of Bacteriology I; National Institute of Infectious Diseases; Tokyo Japan
3. Division of Pharmaceutical Sciences; Sojo University; Kumamoto Japan
4. Department of Microbiology; Faculty of Biochemistry, Biophysics and Biotechnology; Jagiellonian University; Krakow Poland
5. Department of Oral Immunology and Infectious Disease; University of Louisville, School of Dentistry; Louisville KY USA
6. Department of Molecular Pathology; Faculty of Life Sciences; Kumamoto University; Kumamoto Japan